Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Adoption of new accounting standard	Preferred Stock	Common Stock	Common Stock Issuable	Capital Surplus	Retained Earnings (Accumulated Deficit)	Retained Earnings (Accumulated Deficit) Adoption of new accounting standard	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2018	$ 1,457,554	$ (549)	$ 0	$ 79,234	$ 10,744	$ 1,499,584	$ (90,419)	$ (549)	$ (41,589)
Beginning balance (shares) at Dec. 31, 2018				79,234,077
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	185,721						185,721
Other comprehensive income (loss)	49,983								49,983
Purchases of common stock	$ (13,020)			$ (500)		(12,520)
Purchases of common stock (shares)	(500,495)			(500,495)
Common stock dividends	$ (54,601)						(54,601)
Impact of equity-based compensation awards	8,130			$ 122	1,476	6,532
Impact of equity-based compensation awards (shares)				122,100
Impact of other equity plans	2,474			$ 158	(729)	3,045
Impact of other equity plans (shares)				158,047
Ending balance at Dec. 31, 2019	1,635,692	$ (3,529)	0	$ 79,014	11,491	1,496,641	40,152	$ (3,529)	8,394
Ending balance (shares) at Dec. 31, 2019				79,013,729
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	164,089						164,089
Other comprehensive income (loss)	29,316								29,316
Issuance of preferred stock	96,422		96,422
Common stock issued for acquisitions	163,589			$ 8,131		155,458
Common stock issued for acquisitions (shares)				8,130,633
Purchases of common stock	$ (20,782)			$ (827)		(19,955)
Purchases of common stock (shares)	(826,482)			(826,482)
Preferred stock dividends	$ (3,533)						(3,533)
Common stock dividends	(60,310)						(60,310)
Impact of equity-based compensation awards	6,086			$ 202	1,120	4,764
Impact of equity-based compensation awards (shares)				202,437
Impact of other equity plans	490			$ 155	(1,756)	2,091
Impact of other equity plans (shares)				154,962
Ending balance at Dec. 31, 2020	2,007,530		96,422	$ 86,675	10,855	1,638,999	136,869		37,710
Ending balance (shares) at Dec. 31, 2020				86,675,279
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	269,801						269,801
Other comprehensive income (loss)	(64,186)								(64,186)
Common stock issued for acquisitions	95,525			$ 2,864		92,661
Common stock issued for acquisitions (shares)				2,863,734
Purchases of common stock	$ (15,101)			$ (493)		(14,608)
Purchases of common stock (shares)	(492,744)			(492,744)
Preferred stock dividends	$ (6,876)						(6,876)
Common stock dividends	(69,140)						(69,140)
Impact of equity-based compensation awards	3,692			$ 225	1,061	2,406
Impact of equity-based compensation awards (shares)				224,706
Impact of other equity plans	1,000			$ 79	(628)	1,549
Impact of other equity plans (shares)				78,851
Ending balance at Dec. 31, 2021	$ 2,222,245		$ 96,422	$ 89,350	$ 11,288	$ 1,721,007	$ 330,654		$ (26,476)
Ending balance (shares) at Dec. 31, 2021				89,349,826