Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands		Total	Cumulative Effect, Period of Adoption, Adjustment	Preferred Stock	Common Stock	Additional Paid-in Capital	Treasury Stock	AOCI	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment
Beginning balance at Dec. 31, 2019		$ 4,941,690	$ (35,721)	$ 537,145	$ 166,801	$ 3,819,336	$ (715,560)	$ 65,641	$ 1,068,327	$ (35,721)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		373,695							373,695
Other comprehensive income (loss), net of income taxes		92,994						92,994
Cash dividends declared on common stock		(194,658)							(194,658)
Cash dividends declared on preferred stock	[1]	(33,163)							(33,163)
Repurchases of common stock including costs to repurchase		(16,246)			(16,200)		(16,246)
Issuance of common stock for earnout payment		8,695			379	8,316
Restricted share unit vesting and taxes paid related to net share settlement		(7,575)			389	(7,503)			(461)
Stock options/warrants exercised, net		12,982			564	12,418
Share-based compensation expense		18,641				18,641
Ending balance at Dec. 31, 2020		5,161,334		537,145	168,133	3,851,208	(731,806)	158,635	1,178,019
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		760,467							760,467
Other comprehensive income (loss), net of income taxes		(240,956)						(240,956)
Cash dividends declared on common stock		(193,695)							(193,695)
Cash dividends declared on preferred stock	[1]	(33,163)							(33,163)
Repurchases of common stock including costs to repurchase		(199,932)			(199,900)		(199,932)
Issuance of common stock for earnout payment		5,080				4,955	125
Restricted share unit vesting and taxes paid related to net share settlement		(7,544)			355	(6,254)			(1,645)
Stock options/warrants exercised, net		19,110			896	18,214
Warrants exercised with net settlement and common stock reissued		0				(113)	116		(3)
Share-based compensation expense		26,099				26,099
Ending balance at Dec. 31, 2021		5,296,800		537,145	169,384	3,894,109	(931,497)	(82,321)	1,709,980
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		757,902							757,902
Other comprehensive income (loss), net of income taxes		(1,359,796)						(1,359,796)
Cash dividends declared on common stock		(197,762)							(197,762)
Cash dividends declared on preferred stock	[1]	(33,163)							(33,163)
Repurchases of common stock including costs to repurchase		(12,987)			(13,000)		(12,987)
Restricted share unit vesting and taxes paid related to net share settlement		(9,877)			399	(8,089)			(2,187)
Stock options/warrants exercised, net		7,054			358	6,696
Share-based compensation expense		27,630				27,630
Ending balance at Dec. 31, 2022		$ 4,475,801		$ 537,145	$ 170,141	$ 3,920,346	$ (944,484)	$ (1,442,117)	$ 2,234,770

[1] For the years ended December 31, 2022, 2021 and 2020, dividends per share were $1.58 and $1.47 for Series D and Series E Preferred Stock, respectively.