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, 2020		109,181,000
Beginning balance at Dec. 31, 2020	$ 2,337,502	$ 1,678,368	$ 660,398	$ (1,264)
Increase (decrease) in stockholders' equity
Net income for common stock	64,358		64,358
Other comprehensive (loss) income, net of taxes/benefits	(44,016)			(44,016)
Share-based expenses and other, net (in shares)		100,000
Share-based expenses and other, net	605	$ 605
Common stock dividends	(37,156)		(37,156)
Ending balance (in shares) at Mar. 31, 2021		109,281,000
Ending balance at Mar. 31, 2021	$ 2,321,293	$ 1,678,973	687,600	(45,280)
Beginning balance (in shares) at Dec. 31, 2021	109,311,785	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 taxes/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	109,431,346	109,431,000
Ending balance at Mar. 31, 2022	$ 2,303,642	$ 1,684,547	$ 788,787	$ (169,692)