Income Taxes - Deferred Tax Assets (Liabilities) (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets:
Accrued expenses	$ 4,022,000	$ 3,681,000
Net operating loss	4,803,000	5,681,000
Allowance for credit losses, net of bad debt charge-offs	62,582,000	64,628,000
Deferred compensation	3,127,000	3,338,000
State taxes	6,965,000	6,834,000
Loan net discounts	15,566,000	21,980,000
Stock-based compensation	4,327,000	4,030,000
Operating lease liabilities	16,522,000	20,708,000
Unrealized loss on available-for-sale securities	105,313,000	3,156,000
Federal and state credit carryovers	157,000	2,242,000
Other	1,486,000	0
Total deferred tax assets	224,870,000	136,278,000
Deferred tax liabilities:
Operating lease right-of-use assets	(14,378,000)	(18,272,000)
Deferred FDIC gain	(64,000)	(69,000)
Core deposit intangibles	(14,017,000)	(17,676,000)
Loan origination costs	(8,567,000)	(7,547,000)
Depreciation	(4,242,000)	(4,897,000)
Other	0	(473,000)
Total deferred tax liabilities	(41,268,000)	(48,934,000)
Valuation allowance	0	0
Net deferred tax assets	$ 183,602,000	$ 87,344,000