Consolidated Statements of Changes in Capital - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Increase (Decrease) in Stockholders' Equity:
Beginning balance	$ 1,111,980	$ 1,104,018	$ 1,428,387
Common shares reacquired		(50,488)	(3,252)
Common shares issued for compensation		1,064	1,078
Share-based compensation	6,203	5,247	4,828
Net effect of restricted and performance shares issued	(1,284)	(674)	(927)
Dividends to shareholders		(2,701)	(10,803)
Other comprehensive income (loss)	32,098	94,118	(314,891)
Net income (loss)	52,744	(38,604)	(402)
Common shares reacquired	8
Ending balance	1,201,749	1,111,980	1,104,018
Common Stock
Increase (Decrease) in Stockholders' Equity:
Beginning balance	636	634	633
Net effect of restricted and performance shares issued	2	2	1
Ending balance	638	636	634
Additional Paid-in Capital
Increase (Decrease) in Stockholders' Equity:
Beginning balance	403,554	397,919	392,941
Common shares issued for compensation		1,064	1,078
Share-based compensation	6,203	5,247	4,828
Net effect of restricted and performance shares issued	(1,286)	(676)	(928)
Ending balance	408,471	403,554	397,919
Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Stockholders' Equity:
Beginning balance	(204,489)	(298,607)	16,284
Other comprehensive income (loss)	32,098	94,118	(314,891)
Ending balance	(172,391)	(204,489)	(298,607)
Retained Earnings
Increase (Decrease) in Stockholders' Equity:
Beginning balance	1,381,981	1,423,286	1,434,491
Dividends to shareholders		(2,701)	(10,803)
Net income (loss)	52,744	(38,604)	(402)
Ending balance	1,434,725	1,381,981	1,423,286
Treasury Stock
Increase (Decrease) in Stockholders' Equity:
Beginning balance	(469,702)	(419,214)	(415,962)
Common shares reacquired		(50,488)	(3,252)
Common shares reacquired	8
Ending balance	$ (469,694)	$ (469,702)	$ (419,214)