Condensed Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Common stock	Retained earnings	Accumulated other comprehensive income (loss)
Beginning balance (in shares) at Dec. 31, 2022		109,471,000
Beginning balance at Dec. 31, 2022	$ 2,202,499	$ 1,692,697	$ 845,830	$ (336,028)
Increase (decrease) in stockholders' equity
Net income (loss) for common stock	54,721		54,721
Other comprehensive income (loss), net of tax benefits	20,488			20,488
Share-based expenses and other, net and Common stock offering (in shares)		101,000
Share-based expenses and other, net	(307)	$ (307)
Common stock dividends	(39,446)		(39,446)
Ending balance (in shares) at Mar. 31, 2023		109,572,000
Ending balance at Mar. 31, 2023	2,237,955	$ 1,692,390	861,105	(315,540)
Beginning balance (in shares) at Dec. 31, 2022		109,471,000
Beginning balance at Dec. 31, 2022	2,202,499	$ 1,692,697	845,830	(336,028)
Increase (decrease) in stockholders' equity
Net income (loss) for common stock	150,449
Other comprehensive income (loss), net of tax benefits	(21,996)
Ending balance (in shares) at Sep. 30, 2023		110,086,000
Ending balance at Sep. 30, 2023	2,224,354	$ 1,704,447	877,931	(358,024)
Beginning balance (in shares) at Mar. 31, 2023		109,572,000
Beginning balance at Mar. 31, 2023	2,237,955	$ 1,692,390	861,105	(315,540)
Increase (decrease) in stockholders' equity
Net income (loss) for common stock	54,610		54,610
Other comprehensive income (loss), net of tax benefits	(7,609)			(7,609)
Share-based expenses and other, net and Common stock offering (in shares)		40,000
Share-based expenses and other, net	3,868	$ 3,868
Common stock dividends	(39,447)		(39,447)
Ending balance (in shares) at Jun. 30, 2023		109,612,000
Ending balance at Jun. 30, 2023	2,249,377	$ 1,696,258	876,268	(323,149)
Increase (decrease) in stockholders' equity
Net income (loss) for common stock	41,118		41,118
Other comprehensive income (loss), net of tax benefits	(34,875)			(34,875)
Share-based expenses and other, net	2,362	$ 2,362
Dividend reinvestment and stock purchase plan (in shares)		474,000
Dividend reinvestment and stock purchase plan	5,827	$ 5,827
Common stock dividends	(39,455)		(39,455)
Ending balance (in shares) at Sep. 30, 2023		110,086,000
Ending balance at Sep. 30, 2023	$ 2,224,354	$ 1,704,447	877,931	(358,024)
Beginning balance (in shares) at Dec. 31, 2023	110,151,798	110,152,000
Beginning balance at Dec. 31, 2023	$ 2,344,841	$ 1,707,471	926,720	(289,350)
Increase (decrease) in stockholders' equity
Net income (loss) for common stock	42,122		42,122
Other comprehensive income (loss), net of tax benefits	(9,801)			(9,801)
Share-based expenses and other, net and Common stock offering (in shares)		151,000
Share-based expenses and other, net	218	$ 218
Ending balance (in shares) at Mar. 31, 2024		110,303,000
Ending balance at Mar. 31, 2024	$ 2,377,380	$ 1,707,689	968,842	(299,151)
Beginning balance (in shares) at Dec. 31, 2023	110,151,798	110,152,000
Beginning balance at Dec. 31, 2023	$ 2,344,841	$ 1,707,471	926,720	(289,350)
Increase (decrease) in stockholders' equity
Net income (loss) for common stock	(1,357,764)
Other comprehensive income (loss), net of tax benefits	$ 31,153
Ending balance (in shares) at Sep. 30, 2024	172,465,608	172,466,000
Ending balance at Sep. 30, 2024	$ 1,577,041	$ 2,266,282	(431,044)	(258,197)
Beginning balance (in shares) at Mar. 31, 2024		110,303,000
Beginning balance at Mar. 31, 2024	2,377,380	$ 1,707,689	968,842	(299,151)
Increase (decrease) in stockholders' equity
Net income (loss) for common stock	(1,295,484)		(1,295,484)
Other comprehensive income (loss), net of tax benefits	1,594			1,594
Share-based expenses and other, net	1,783	$ 1,783
Ending balance (in shares) at Jun. 30, 2024		110,303,000
Ending balance at Jun. 30, 2024	1,085,273	$ 1,709,472	(326,642)	(297,557)
Increase (decrease) in stockholders' equity
Net income (loss) for common stock	(104,402)		(104,402)
Other comprehensive income (loss), net of tax benefits	39,360			39,360
Share-based expenses and other, net and Common stock offering (in shares)		62,163,000
Common stock offering	575,000	$ 575,000
Share-based expenses and other, net	$ (18,190)	$ (18,190)
Ending balance (in shares) at Sep. 30, 2024	172,465,608	172,466,000
Ending balance at Sep. 30, 2024	$ 1,577,041	$ 2,266,282	$ (431,044)	$ (258,197)