Employee Benefit Plans and Other Postretirement Benefits - Schedule of Fair Value of Pension Plan and Postretirement Healthcare Plan Assets (Details) - USD ($)
$ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
| Pension Benefits |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
$ 1,881,448
|
$ 1,839,779
|
|
| Pension Benefits | Fair Value, Inputs, Level 1 and 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
1,881,076
|
1,838,890
|
|
| Pension Benefits | Level 1 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
484,768
|
471,860
|
|
| Pension Benefits | Level 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
1,396,308
|
1,367,030
|
|
| Pension Benefits | Fair Value Measured at Net Asset Value Per Share |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
372
|
889
|
|
| Pension Benefits | Cash and cash equivalents | Fair Value, Inputs, Level 1 and 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
34,593
|
26,111
|
|
| Pension Benefits | Cash and cash equivalents | Level 1 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
34,593
|
26,111
|
|
| Pension Benefits | Cash and cash equivalents | Level 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
0
|
0
|
|
| Pension Benefits | Equity Holdings | Fair Value, Inputs, Level 1 and 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
431,558
|
427,618
|
|
| Pension Benefits | Equity Holdings | Level 1 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
386,762
|
325,721
|
|
| Pension Benefits | Equity Holdings | Level 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
44,796
|
101,897
|
|
| Pension Benefits | U.S. companies | Fair Value, Inputs, Level 1 and 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
190,782
|
190,113
|
|
| Pension Benefits | U.S. companies | Level 1 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
190,751
|
190,058
|
|
| Pension Benefits | U.S. companies | Level 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
31
|
55
|
|
| Pension Benefits | Foreign companies | Fair Value, Inputs, Level 1 and 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
47
|
32
|
|
| Pension Benefits | Foreign companies | Level 1 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
47
|
32
|
|
| Pension Benefits | Foreign companies | Level 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
0
|
0
|
|
| Pension Benefits | Pooled equity funds | Fair Value, Inputs, Level 1 and 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
240,729
|
237,473
|
|
| Pension Benefits | Pooled equity funds | Level 1 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
195,964
|
135,631
|
|
| Pension Benefits | Pooled equity funds | Level 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
44,765
|
101,842
|
|
| Pension Benefits | Fixed-income holdings | Fair Value, Inputs, Level 1 and 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
1,414,925
|
1,385,161
|
|
| Pension Benefits | Fixed-income holdings | Level 1 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
63,413
|
120,028
|
|
| Pension Benefits | Fixed-income holdings | Level 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
1,351,512
|
1,265,133
|
|
| Pension Benefits | U.S. Treasuries | Fair Value, Inputs, Level 1 and 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
63,413
|
120,028
|
|
| Pension Benefits | U.S. Treasuries | Level 1 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
63,413
|
120,028
|
|
| Pension Benefits | U.S. Treasuries | Level 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
0
|
0
|
|
| Pension Benefits | Federal agencies | Fair Value, Inputs, Level 1 and 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
1,086
|
11,271
|
|
| Pension Benefits | Federal agencies | Level 1 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
0
|
0
|
|
| Pension Benefits | Federal agencies | Level 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
1,086
|
11,271
|
|
| Pension Benefits | Corporate bonds | Fair Value, Inputs, Level 1 and 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
508,778
|
694,002
|
|
| Pension Benefits | Corporate bonds | Level 1 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
0
|
0
|
|
| Pension Benefits | Corporate bonds | Level 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
508,778
|
694,002
|
|
| Pension Benefits | Pooled fixed income funds | Fair Value, Inputs, Level 1 and 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
769,289
|
463,769
|
|
| Pension Benefits | Pooled fixed income funds | Level 1 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
0
|
0
|
|
| Pension Benefits | Pooled fixed income funds | Level 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
769,289
|
463,769
|
|
| Pension Benefits | Foreign bonds | Fair Value, Inputs, Level 1 and 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
66,135
|
86,071
|
|
| Pension Benefits | Foreign bonds | Level 1 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
0
|
0
|
|
| Pension Benefits | Foreign bonds | Level 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
66,135
|
86,071
|
|
| Pension Benefits | Municipal bonds | Fair Value, Inputs, Level 1 and 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
6,224
|
10,020
|
|
| Pension Benefits | Municipal bonds | Level 1 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
0
|
0
|
|
| Pension Benefits | Municipal bonds | Level 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
6,224
|
10,020
|
|
| Pension Benefits | Private equity investments | Fair Value Measured at Net Asset Value Per Share |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
0
|
334
|
|
| Pension Benefits | Real estate investments | Fair Value Measured at Net Asset Value Per Share |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
372
|
555
|
|
| Postretirement Healthcare Benefits |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
276,505
|
244,490
|
$ 225,167
|
| Postretirement Healthcare Benefits | Fair Value, Inputs, Level 1 and 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
260,663
|
229,615
|
|
| Postretirement Healthcare Benefits | Level 1 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
199,543
|
173,257
|
|
| Postretirement Healthcare Benefits | Level 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
61,120
|
56,358
|
|
| Postretirement Healthcare Benefits | Cash and cash equivalents | Fair Value, Inputs, Level 1 and 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
2,434
|
1,824
|
|
| Postretirement Healthcare Benefits | Cash and cash equivalents | Level 1 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
2,434
|
1,824
|
|
| Postretirement Healthcare Benefits | Cash and cash equivalents | Level 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
0
|
0
|
|
| Postretirement Healthcare Benefits | Equity Holdings | Fair Value, Inputs, Level 1 and 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
195,536
|
169,500
|
|
| Postretirement Healthcare Benefits | Equity Holdings | Level 1 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
181,068
|
156,298
|
|
| Postretirement Healthcare Benefits | Equity Holdings | Level 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
14,468
|
13,202
|
|
| Postretirement Healthcare Benefits | U.S. companies | Fair Value, Inputs, Level 1 and 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
96,608
|
88,083
|
|
| Postretirement Healthcare Benefits | U.S. companies | Level 1 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
96,608
|
88,083
|
|
| Postretirement Healthcare Benefits | U.S. companies | Level 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
0
|
0
|
|
| Postretirement Healthcare Benefits | Foreign companies | Fair Value, Inputs, Level 1 and 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
39,889
|
27,430
|
|
| Postretirement Healthcare Benefits | Foreign companies | Level 1 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
39,889
|
27,430
|
|
| Postretirement Healthcare Benefits | Foreign companies | Level 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
0
|
0
|
|
| Postretirement Healthcare Benefits | Pooled equity funds | Fair Value, Inputs, Level 1 and 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
59,039
|
53,987
|
|
| Postretirement Healthcare Benefits | Pooled equity funds | Level 1 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
44,571
|
40,785
|
|
| Postretirement Healthcare Benefits | Pooled equity funds | Level 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
14,468
|
13,202
|
|
| Postretirement Healthcare Benefits | Fixed-income holdings | Fair Value, Inputs, Level 1 and 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
62,693
|
58,291
|
|
| Postretirement Healthcare Benefits | Fixed-income holdings | Level 1 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
16,041
|
15,135
|
|
| Postretirement Healthcare Benefits | Fixed-income holdings | Level 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
46,652
|
43,156
|
|
| Postretirement Healthcare Benefits | U.S. Treasuries | Fair Value, Inputs, Level 1 and 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
234
|
415
|
|
| Postretirement Healthcare Benefits | U.S. Treasuries | Level 1 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
234
|
415
|
|
| Postretirement Healthcare Benefits | U.S. Treasuries | Level 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
0
|
0
|
|
| Postretirement Healthcare Benefits | Federal agencies | Fair Value, Inputs, Level 1 and 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
4
|
39
|
|
| Postretirement Healthcare Benefits | Federal agencies | Level 1 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
0
|
0
|
|
| Postretirement Healthcare Benefits | Federal agencies | Level 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
4
|
39
|
|
| Postretirement Healthcare Benefits | Corporate bonds | Fair Value, Inputs, Level 1 and 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
1,871
|
2,388
|
|
| Postretirement Healthcare Benefits | Corporate bonds | Level 1 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
0
|
0
|
|
| Postretirement Healthcare Benefits | Corporate bonds | Level 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
1,871
|
2,388
|
|
| Postretirement Healthcare Benefits | Pooled fixed income funds | Fair Value, Inputs, Level 1 and 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
60,318
|
55,119
|
|
| Postretirement Healthcare Benefits | Pooled fixed income funds | Level 1 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
15,807
|
14,720
|
|
| Postretirement Healthcare Benefits | Pooled fixed income funds | Level 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
44,511
|
40,399
|
|
| Postretirement Healthcare Benefits | Foreign bonds | Fair Value, Inputs, Level 1 and 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
243
|
296
|
|
| Postretirement Healthcare Benefits | Foreign bonds | Level 1 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
0
|
0
|
|
| Postretirement Healthcare Benefits | Foreign bonds | Level 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
243
|
296
|
|
| Postretirement Healthcare Benefits | Municipal bonds | Fair Value, Inputs, Level 1 and 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
23
|
34
|
|
| Postretirement Healthcare Benefits | Municipal bonds | Level 1 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
0
|
0
|
|
| Postretirement Healthcare Benefits | Municipal bonds | Level 2 |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
23
|
34
|
|
| Postretirement Healthcare Benefits | Limited partnership interests | Fair Value Measured at Net Asset Value Per Share |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
15,604
|
14,537
|
|
| Postretirement Healthcare Benefits | Real estate investments | Fair Value Measured at Net Asset Value Per Share |
|
|
|
| Defined Benefit Plan Disclosure |
|
|
|
| Total benefit plan assets |
$ 238
|
$ 338
|
|