v3.24.2.u1
Consolidated Statement of Cash Flows - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Operating activities:    
Net income $ 61,036 $ 72,915
Adjustments to reconcile net income to cash provided by operations:    
Depreciation 66,860 62,758
Regulatory amortization of gas reserves 1,085 1,678
Deferred income taxes 8,844 8,610
Qualified defined benefit pension plan expense (benefit) 2,164 (1,129)
Contributions to qualified defined benefit pension plans (3,390) 0
Deferred environmental expenditures, net (14,128) (9,732)
Environmental remediation expense 8,075 7,515
Asset optimization revenue sharing bill credits (29,198) (10,471)
Other 15,698 14,068
Changes in assets and liabilities:    
Receivables, net 118,562 163,965
Inventories 5,411 20,084
Income and other taxes 14,837 14,834
Accounts payable (10,966) (48,935)
Deferred gas costs (14,418) (16,370)
Increase (Decrease) in Asset Optimization Revenue Sharing (4,284) (12,056)
Decoupling mechanism 4,085 (9,554)
Change in Cloud-based software Assets (16,424) (7,229)
Asset optimization revenue sharing 14,866 8,992
Other, net 8,793 13,799
Cash provided by operating activities 246,076 297,854
Investing activities:    
Payments to Acquire Property, Plant, and Equipment (198,929) (144,863)
Acquisitions, net of cash acquired 0 (3,249)
Purchase of equity method investment (1,000) (1,000)
Other (512) (2,428)
Cash used in investing activities (200,441) (151,540)
Financing activities:    
Proceeds from common stock issued, net 34,986 22,072
Long-term debt issued 150,000 200,000
Long-term debt retired (150,000) 0
Changes in other short-term debt, net (10,780) (217,200)
Cash dividend payments on common stock (35,600) (33,293)
Payment of financing fees (748) (1,883)
Shares withheld for tax purposes (1,314) (1,313)
Other (764) (578)
Cash used in financing activities (14,220) (32,195)
Cash, cash equivalents and restricted cash 81,039 155,083
Increase (decrease) in cash, cash equivalents and restricted cash 31,415 114,119
Supplemental disclosure of cash flow information:    
Interest paid, net of capitalization 34,802 36,376
Income taxes paid, net of refunds 10,251 12,163
Northwest Natural Gas Company [Member]    
Operating activities:    
Net income 67,134 77,324
Adjustments to reconcile net income to cash provided by operations:    
Depreciation 62,765 60,024
Regulatory amortization of gas reserves 1,085 1,678
Deferred income taxes 7,637 4,172
Qualified defined benefit pension plan expense (benefit) 2,164 (1,129)
Contributions to qualified defined benefit pension plans (3,390) 0
Deferred environmental expenditures, net (14,128) (9,732)
Environmental remediation expense 8,075 7,515
Asset optimization revenue sharing bill credits (29,198) (10,471)
Other 14,821 13,022
Changes in assets and liabilities:    
Receivables, net 119,695 167,936
Inventories 5,629 20,438
Income and other taxes 3,971 6,078
Accounts payable (13,544) (52,366)
Deferred gas costs (14,418) (16,370)
Increase (Decrease) in Asset Optimization Revenue Sharing (4,284) (12,056)
Decoupling mechanism 4,085 (9,554)
Change in Cloud-based software Assets (16,424) (7,229)
Asset optimization revenue sharing 14,867 9,020
Other, net 7,089 15,593
Cash provided by operating activities 232,199 288,005
Investing activities:    
Payments to Acquire Property, Plant, and Equipment (179,015) (129,298)
Other (757) (2,428)
Cash used in investing activities (179,772) (131,726)
Financing activities:    
Long-term debt issued 0 200,000
Changes in other short-term debt, net (16,780) (170,200)
Cash dividend payments on common stock (35,565) (58,315)
Shares withheld for tax purposes (1,314) (1,313)
Other (277) (2,045)
Cash used in financing activities (53,936) (31,873)
Cash, cash equivalents and restricted cash 35,011 149,077
Increase (decrease) in cash, cash equivalents and restricted cash (1,509) 124,406
Supplemental disclosure of cash flow information:    
Interest paid, net of capitalization 28,735 28,078
Income taxes paid, net of refunds $ 24,920 $ 26,745