Condensed Financial Information (parent company only) - Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Assets
Cash and due from banks	$ 122,594	$ 167,146
Premises and equipment	117,118	105,655
Interest receivable	85,070	57,187
Goodwill	712,002	545,385	$ 543,918
Cash surrender value of life insurance	308,311	291,041
Other assets	221,631	140,167
TOTAL ASSETS	17,938,306	15,453,149
Liabilities [Abstract]
Subordinated debentures and other borrowings	1,313,945	634,250
Interest payable	7,530	2,762
Other liabilities	199,316	170,989
Total Liabilities	15,903,536	13,540,578
Stockholders' equity	2,034,770	1,912,571	$ 1,875,645	$ 1,786,437
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	17,938,306	15,453,149
Parent
Assets
Cash and due from banks	56,739	127,501
Investment in subsidiaries	2,124,104	1,900,787
Premises and equipment	119	274
Interest receivable	6	2
Goodwill	448	448
Cash surrender value of life insurance	736	716
Other assets	6,851	10,281
TOTAL ASSETS	2,189,003	2,040,009
Liabilities [Abstract]
Subordinated debentures and other borrowings	150,115	118,618
Interest payable	979	864
Other liabilities	3,139	7,956
Total Liabilities	154,233	127,438
Stockholders' equity	2,034,770	1,912,571
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 2,189,003	$ 2,040,009