Acquisitions - Limestone Bancorp, Inc. (Details) - USD ($) $ in Thousands		Apr. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Assets
Loans	[1]		$ 5,974,596		$ 4,707,150
Allowance for credit losses (on PCD loans)			(61,211)	$ (53,303)	(53,162)	$ (52,346)	$ (54,768)	$ (63,967)
Net loans	[2]		5,913,385		4,653,988
Other intangible assets			27,722		15,284
Liabilities
Goodwill			356,397		$ 292,397			$ 264,193
Limestone Bancorp, Inc.
Business Acquisition [Line Items]
Total purchase price		$ 177,931
Assets
Cash and balances due from banks		5,260
Interest-bearing deposits in other banks		87,115
Total cash and cash equivalents		92,375
Loans		1,079,253
Allowance for credit losses (on PCD loans)		(1,008)
Net loans		1,078,245
Bank premises and equipment, net of accumulated depreciation		17,690
Bank owned life insurance		31,343
Other intangible assets		27,722
Other assets		35,372
Total assets		1,455,407
Liabilities
Deposits		1,234,184
Short-term borrowings		60,000
Long-term borrowings		33,744
Accrued expenses and other liabilities		12,967
Total liabilities		1,340,895
Net assets		114,512
Goodwill		63,419	$ 63,400
Limestone Bancorp, Inc. | Non-interest-bearing
Liabilities
Deposits		262,727
Limestone Bancorp, Inc. | Interest-bearing
Liabilities
Deposits		971,457
Limestone Bancorp, Inc. | Available-for-sale investment securities, at fair value
Assets
Investment securities		166,944
Limestone Bancorp, Inc. | Other investment securities
Assets
Investment securities		5,716
Limestone Bancorp, Inc. | Total investment securities
Assets
Investment securities		$ 172,660

[1] Also referred to throughout this Quarterly Report on Form 10-Q as "total loans" and "loans held for investment."

[2] Also referred to throughout this Quarterly Report on Form 10-Q as "net loans"