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, 2021		109,312,000
Beginning balance at Dec. 31, 2021	$ 2,390,884	$ 1,685,496	$ 757,921	$ (52,533)
Increase (decrease) in stockholders' equity
Net income for common stock	69,167		69,167
Other comprehensive (loss) income, net of tax benefits	(117,159)			(117,159)
Share-based expenses and other, net (in shares)		119,000
Share-based expenses and other, net	(949)	$ (949)
Common stock dividends	(38,301)		(38,301)
Ending balance (in shares) at Mar. 31, 2022		109,431,000
Ending balance at Mar. 31, 2022	$ 2,303,642	$ 1,684,547	788,787	(169,692)
Beginning balance (in shares) at Dec. 31, 2022	109,470,795	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 for common stock	54,721		54,721
Other comprehensive (loss) income, net of tax benefits	20,488			20,488
Share-based expenses and other, net (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	109,572,075	109,572,000
Ending balance at Mar. 31, 2023	$ 2,237,955	$ 1,692,390	$ 861,105	$ (315,540)