CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - UNAUDITED - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock, Common	Accumulated Other Comprehensive Income
Preferred stock, beginning balance - shares at Dec. 31, 2020		6,000,000
Common stock, beginning balance - shares at Dec. 31, 2020			50,470,867
Treasury stock, common, beginning balance - shares at Dec. 31, 2020						417
Beginning balance - Amount at Dec. 31, 2020	$ 2,871,224	$ 150,000	$ 504	$ 991,898	$ 1,713,056	$ (8)	$ 15,774
Comprehensive income:
Net income	188,809				188,809
Change in other comprehensive income/(loss), net of taxes	(56,486)						(56,486)
Comprehensive income/(loss)	132,323
Stock-based compensation expense recognized in earnings	22,100			22,100
Issuance of preferred stock - Shares		300,000
Issuance of preferred stock - Amount	289,723	$ 300,000		(10,277)
Preferred stock dividend	(14,408)				(14,408)
Issuance of stock related to stock-based awards - Shares			135,176
Issuance of stock related to stock-based awards - Amount	(3,210)		$ 2	(3,212)
Redemption of preferred stock - shares		(6,000,000)
Redemption of preferred stock	(150,000)	$ (150,000)
Preferred stock, ending balance - shares at Sep. 30, 2021		300,000
Common stock, ending balance - shares at Sep. 30, 2021			50,606,043
Treasury stock, common, ending balance - shares at Sep. 30, 2021						417
Ending balance - Amount at Sep. 30, 2021	3,147,752	$ 300,000	$ 506	1,000,509	1,887,457	$ (8)	(40,712)
Preferred stock, beginning balance - shares at Jun. 30, 2021		300,000
Common stock, beginning balance - shares at Jun. 30, 2021			50,592,618
Treasury stock, common, beginning balance - shares at Jun. 30, 2021						417
Beginning balance - Amount at Jun. 30, 2021	3,114,957	$ 300,000	$ 506	992,469	1,848,379	$ (8)	(26,389)
Comprehensive income:
Net income	43,390				43,390
Change in other comprehensive income/(loss), net of taxes	(14,323)						(14,323)
Comprehensive income/(loss)	29,067
Stock-based compensation expense recognized in earnings	8,324			8,324
Preferred stock dividend	(4,312)				(4,312)
Issuance of stock related to stock-based awards - Shares			13,425
Issuance of stock related to stock-based awards - Amount	(284)		$ 0	(284)
Preferred stock, ending balance - shares at Sep. 30, 2021		300,000
Common stock, ending balance - shares at Sep. 30, 2021			50,606,043
Treasury stock, common, ending balance - shares at Sep. 30, 2021						417
Ending balance - Amount at Sep. 30, 2021	3,147,752	$ 300,000	$ 506	1,000,509	1,887,457	$ (8)	(40,712)
Preferred stock, beginning balance - shares at Dec. 31, 2021		300,000
Common stock, beginning balance - shares at Dec. 31, 2021			50,618,911
Treasury stock, common, beginning balance - shares at Dec. 31, 2021						417
Beginning balance - Amount at Dec. 31, 2021	3,209,616	$ 300,000	$ 506	1,008,559	1,948,274	$ (8)	(47,715)
Comprehensive income:
Net income	115,227				115,227
Change in other comprehensive income/(loss), net of taxes	(387,704)						(387,704)
Comprehensive income/(loss)	(272,477)
Stock-based compensation expense recognized in earnings	15,805			15,805
Preferred stock dividend	(12,938)				(12,938)
Issuance of stock related to stock-based awards - Shares			221,111
Issuance of stock related to stock-based awards - Amount	$ (4,208)		$ 3	(4,211)
Repurchase of common stock - shares	(941,879)					(941,879)
Repurchase of common stock	$ (50,023)					$ (50,023)
Preferred stock, ending balance - shares at Sep. 30, 2022		300,000
Common stock, ending balance - shares at Sep. 30, 2022			50,840,022
Treasury stock, common, ending balance - shares at Sep. 30, 2022						942,296
Ending balance - Amount at Sep. 30, 2022	2,885,775	$ 300,000	$ 509	1,020,153	2,050,563	$ (50,031)	(435,419)
Preferred stock, beginning balance - shares at Jun. 30, 2022		300,000
Common stock, beginning balance - shares at Jun. 30, 2022			50,820,337
Treasury stock, common, beginning balance - shares at Jun. 30, 2022						942,296
Beginning balance - Amount at Jun. 30, 2022	3,006,832	$ 300,000	$ 508	1,015,105	2,013,458	$ (50,031)	(272,208)
Comprehensive income:
Net income	41,418				41,418
Change in other comprehensive income/(loss), net of taxes	(163,211)						(163,211)
Comprehensive income/(loss)	(121,793)
Stock-based compensation expense recognized in earnings	5,376			5,376
Preferred stock dividend	(4,313)				(4,313)
Issuance of stock related to stock-based awards - Shares			19,685
Issuance of stock related to stock-based awards - Amount	(327)		$ 1	(328)
Preferred stock, ending balance - shares at Sep. 30, 2022		300,000
Common stock, ending balance - shares at Sep. 30, 2022			50,840,022
Treasury stock, common, ending balance - shares at Sep. 30, 2022						942,296
Ending balance - Amount at Sep. 30, 2022	$ 2,885,775	$ 300,000	$ 509	$ 1,020,153	$ 2,050,563	$ (50,031)	$ (435,419)