Consolidated Statements of Changes in Shareholders' Equity — Unaudited - USD ($) $ in Thousands		Total	Preferred Stock	Common Stock	Additional Paid in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Beginning balance, preferred stock (shares) at Dec. 31, 2021			5,700,000
Beginning balance at Dec. 31, 2021		$ 1,366,217	$ 137,794	$ 34,722	$ 542,391	$ 705,732	$ (4,980)	$ (49,442)
Beginning balance, common stock (shares) at Dec. 31, 2021				32,913,267
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		199,323				199,323
Other comprehensive income (loss)		(151,146)					(151,146)
Preferred stock dividends	[1]	(6,544)				(6,544)
Share-based compensation expense		10,657			10,657
Issuance of common stock under share-based compensation arrangements (shares)				226,380
Issuance of common stock under share-based compensation arrangements		$ (3,756)		$ 226	(3,982)
Repurchase of common shares (in shares)		(664,145)		(664,145)
Repurchase of common shares		$ (27,820)						(27,820)
Ending balance, preferred stock (shares) at Sep. 30, 2022			5,700,000
Ending balance at Sep. 30, 2022		1,386,931	$ 137,794	$ 34,948	549,066	898,511	(156,126)	(77,262)
Ending balance, common stock (shares) at Sep. 30, 2022				32,475,502
Beginning balance, preferred stock (shares) at Jun. 30, 2022			5,700,000
Beginning balance at Jun. 30, 2022		1,353,390	$ 137,794	$ 34,922	545,670	837,147	(124,881)	(77,262)
Beginning balance, common stock (shares) at Jun. 30, 2022				32,449,486
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		63,912				63,912
Other comprehensive income (loss)		(31,245)					(31,245)
Preferred stock dividends	[2]	(2,548)				(2,548)
Share-based compensation expense		3,336			3,336
Issuance of common stock under share-based compensation arrangements (shares)				26,016
Issuance of common stock under share-based compensation arrangements		$ 86		$ 26	60
Repurchase of common shares (in shares)		0
Ending balance, preferred stock (shares) at Sep. 30, 2022			5,700,000
Ending balance at Sep. 30, 2022		$ 1,386,931	$ 137,794	$ 34,948	549,066	898,511	(156,126)	(77,262)
Ending balance, common stock (shares) at Sep. 30, 2022				32,475,502
Beginning balance, preferred stock (shares) at Dec. 31, 2022		5,700,000	5,700,000
Beginning balance at Dec. 31, 2022		$ 1,402,961	$ 137,794	$ 35,012	551,721	924,134	(163,096)	(82,604)
Beginning balance, common stock (shares) at Dec. 31, 2022		32,373,697		32,373,697
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		$ 188,051				188,051
Other comprehensive income (loss)		13,284					13,284
Preferred stock dividends	[1]	(10,826)				(10,826)
Share-based compensation expense		9,979			9,979
Issuance of common stock under share-based compensation arrangements (shares)				317,440
Issuance of common stock under share-based compensation arrangements		$ (2,036)		$ 318	(2,354)
Repurchase of common shares (in shares)		(1,379,883)		(1,379,883)
Repurchase of common shares		$ (39,806)						(39,806)
Ending balance, preferred stock (shares) at Sep. 30, 2023		5,700,000	5,700,000
Ending balance at Sep. 30, 2023		$ 1,561,607	$ 137,794	$ 35,330	559,346	1,101,359	(149,812)	(122,410)
Ending balance, common stock (shares) at Sep. 30, 2023		31,311,254		31,311,254
Beginning balance, preferred stock (shares) at Jun. 30, 2023			5,700,000
Beginning balance at Jun. 30, 2023		$ 1,456,652	$ 137,794	$ 35,301	555,737	1,018,406	(168,176)	(122,410)
Beginning balance, common stock (shares) at Jun. 30, 2023				31,282,318
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		86,756				86,756
Other comprehensive income (loss)		18,364					18,364
Preferred stock dividends	[2]	(3,803)				(3,803)
Share-based compensation expense		3,510			3,510
Issuance of common stock under share-based compensation arrangements (shares)				28,936
Issuance of common stock under share-based compensation arrangements		$ 128		$ 29	99
Repurchase of common shares (in shares)		0
Ending balance, preferred stock (shares) at Sep. 30, 2023		5,700,000	5,700,000
Ending balance at Sep. 30, 2023		$ 1,561,607	$ 137,794	$ 35,330	$ 559,346	$ 1,101,359	$ (149,812)	$ (122,410)
Ending balance, common stock (shares) at Sep. 30, 2023		31,311,254		31,311,254

[1] Dividends per share of $1.941704 and $1.869779 were declared on Series E and F preferred stock, respectively, for the nine months ended September 30, 2023. Dividends per share of $1.160316 and $1.088391 were declared on Series E and F preferred stock, respectively, for the nine months ended September 30, 2022.

[2] Dividends per share of $0.6831 and $0.658950 were declared on Series E and F preferred stock, respectively, for the three months ended September 30, 2023. Dividends per share of $0.445233 and $0.421083 were declared on Series E and F preferred stock, respectively, for the three months ended September 30, 2022.