v3.25.4
Share-based payments (Tables)
 12 Months Ended
Dec. 31, 2025
Share-Based Payment Arrangement [Abstract]  
Schedule of changes in outstanding ELTIP and EDIP awards
Changes in Outstanding ELTIP and EDIP awards (in thousands of shares transferable upon vesting)
Year ended
December 31, 2025December 31, 2024December 31, 2023
EDIPELTIPEDIPELTIPEDIPELTIP
Outstanding at beginning of year628 1,151 665 915 621 705 
Granted135 361 105 573 199 395 
Vested (fair value in 2025: $22.4 million, 2024: $14.2 million; 2023: $11.2 million)
(263)(274)(139)(333)(155)(185)
Forfeitures and cancellations— (2)(3)(4)— — 
Outstanding at end of year500 1,236 628 1,151 665 915 
Schedule of share-based compensation cost recognized in net income
Share-based Compensation Cost Recognized in the Financial Statements
Year ended
December 31, 2025December 31, 2024December 31, 2023
EDIP and
 ELTIP		EDIP and
 ELTIP		EDIP and
 ELTIP
EDIP and ELTIP21,350 19,971 19,676 
ESPP (employee contributions and value of discount from market price)564 595 679 
Share-based Compensation Cost Recognized in Net Income21,914 20,566 20,355 
Deduct: Fair value of awards withheld for employees' payroll tax purposes(211)(118)(123)
Share-based Compensation Cost Recognized in Additional Paid-in Capital21,703 20,448 20,232 
Schedule of unrecognized compensation cost
Year ended
Unrecognized Share-based Compensation CostDecember 31, 2025December 31, 2024
Unrecognized costWeighted average years over which it is expected to be recognizedUnrecognized costWeighted average years over which it is expected to be recognized
EDIP6,573 1.528,829 1.88
ELTIP
Time vesting shares8 0.1266 1.12
Performance vesting shares15,053 1.6515,877 1.79
Total unrecognized expense21,634 24,772