Parent Company Balance Sheet (Details) - USD ($) $ in Thousands		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Assets:
Other Assets		$ 538,674	$ 551,289
Derivative Asset		92,185	187,422
Total assets		20,423,405	13,204,301
Liabilities and stockholders’ equity
Subordinated debentures (less unamortized debt issuance costs of $209 and $304)		49,791	49,696
Derivative Liability		69,246	117,959
Other liabilities		335,538	327,386
Total liabilities		17,404,956	11,501,616
Stockholders’ equity		3,018,449	1,702,685	$ 1,708,143	$ 1,073,490
Liabilities and Equity		20,423,405	13,204,301
Parent Company [Member]
Assets:
Cash	[1]	212,119	100,604
Investments in subsidiaries	[2]	2,952,089	1,761,383
Prepaid income taxes		3,973	1,927
Other Assets		472	642
Total assets		3,168,653	1,864,556
Liabilities and stockholders’ equity
Dividends payable		22,728	15,164
Long-term Debt		14,063	32,773
Junior subordinated debentures (less unamortized debt issuance costs of $35 and $37)		62,853	62,851
Subordinated debentures (less unamortized debt issuance costs of $209 and $304)		49,791	49,696
Derivative Liability	[1]	0	569
Other liabilities		769	818
Total liabilities		150,204	161,871
Stockholders’ equity		3,018,449	1,702,685
Liabilities and Equity		3,168,653	1,864,556
Parent Company [Member] | Junior Subordinated Debt [Member]
Liabilities and stockholders’ equity
Unamortized Debt Issuance Expense		35	37
Long-term Debt [Member]
Liabilities and stockholders’ equity
Unamortized Debt Issuance Expense		0	40
Long-term Debt [Member] | Parent Company [Member]
Liabilities and stockholders’ equity
Unamortized Debt Issuance Expense		0	40
Subordinated Debt [Member]
Liabilities and stockholders’ equity
Unamortized Debt Issuance Expense		209	304
Subordinated Debt [Member] | Parent Company [Member]
Liabilities and stockholders’ equity
Unamortized Debt Issuance Expense		$ 209	$ 304

[1] Entire balance eliminates in consolidation.

[2] Majority of balance eliminates in consolidation