Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Capital Surplus [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance at Dec. 31, 2022	$ 1,492,268	$ 12,705	$ 154,645	$ 1,600,321	$ (275,403)
Balance (in shares) at Dec. 31, 2022		60,977,686
Net Income (Loss)	50,300			50,300
Other comprehensive income (loss), net of tax	33,022				33,022
Common stock dividends paid ($0.23 per share)	(14,158)			(14,158)
Shares withheld to pay taxes, long-term incentive plan	(1,048)	$ 15	(1,063)
Shares withheld to pay taxes, long-term incentive plan (in shares)		70,830
Compensation expense, long-term incentive plan	1,715		1,715
Balance at Mar. 31, 2023	1,562,099	$ 12,720	155,297	1,636,463	(242,381)
Balance (in shares) at Mar. 31, 2023		61,048,516
Balance at Dec. 31, 2023	$ 1,661,847	$ 12,725	159,688	1,709,157	(219,723)
Balance (in shares) at Dec. 31, 2023	61,071,173	61,071,173
Net Income (Loss)	$ 41,535			41,535
Other comprehensive income (loss), net of tax	(7,431)				(7,431)
Common stock dividends paid ($0.23 per share)	(14,207)			(14,207)
Shares withheld to pay taxes, long-term incentive plan	(1,383)	$ 22	(1,405)
Shares withheld to pay taxes, long-term incentive plan (in shares)		107,193
Compensation expense, long-term incentive plan	2,238		2,238
Balance at Mar. 31, 2024	$ 1,682,599	$ 12,747	$ 160,521	$ 1,736,485	$ (227,154)
Balance (in shares) at Mar. 31, 2024	61,178,366	61,178,366