Loans and Allowance for Credit Losses - Schedule of Accounts, Notes, Loans and Financing Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Loans Receivable	$ 4,007,500	$ 4,296,804
Allowance for credit losses
Loans Receivable	(60,754)	(55,743)
Deferred loan fees and gains, net
Loans Receivable	(9,298)	(9,260)
Commercial construction
Loans Receivable	617,505	484,372
Commercial Real Estate
Loans Receivable	1,476,230	1,541,242
Industrial revenue bonds
Loans Receivable	14,203	14,003
Consumer auto
Loans Receivable	48,915	86,173
Home Equity Line of Credit
Loans Receivable	119,965	114,689
Loans Receivable, Gross
Loans Receivable	4,077,552	4,361,807
Land development
Loans Receivable	47,827	54,010
One- to four-family residential construction
Loans Receivable	28,302	20,718
Subdivision construction
Loans Receivable	26,694	4,917
Owner occupied one- to four-family residential
Loans Receivable	561,958	470,310
Non-owner occupied one- to four-family residential
Loans Receivable	119,635	114,498
Other residential
Loans Receivable	697,903	999,447
Commercial business
Loans Receivable	280,513	318,023
Consumer
Loans Receivable	$ 37,902	40,762
Acquired Loans Net of Discount
Loans Receivable		$ 98,643