Business Combinations - Narrative (Details) $ / shares in Units, $ in Thousands		3 Months Ended
	Jan. 01, 2022 USD ($) banking_office $ / shares shares	Mar. 31, 2022 USD ($) banking_office	Dec. 31, 2021 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Business Acquisition [Line Items]
Number of banking offices | banking_office		77
Assets		$ 6,697,629	$ 5,608,539
Loans		3,656,034	3,007,926
Goodwill		178,619	121,761
Provision for credit losses excluded from pro-forma information		45,078	$ 37,017	$ 45,099	$ 46,859
CUB
Business Acquisition [Line Items]
Direct acquisition costs	$ 11,705
Goodwill	56,859
Intangible Assets	7,572
Cash paid for acquisition	50,800
Fair value of purchased financial assets with credit deterioration	678,167
Gross contractual receivable for purchased financial assets with credit deterioration	683,526	659,212
Non-recurring merger costs excluded from pro forma information		11,705
CUB | Cumulative Effect, Period of Adoption, Adjustment
Business Acquisition [Line Items]
Provision for credit losses excluded from pro-forma information		$ 6,300
CUB | PCD Loans
Business Acquisition [Line Items]
Fair value of purchased financial assets with credit deterioration	29,868
Gross contractual receivable for purchased financial assets with credit deterioration	34,453
Estimated contractual cash flows of purchased financial asset with credit deterioration	3,128
CUB | Core Deposits
Business Acquisition [Line Items]
Intangible Assets	$ 7,572
Weighted average useful live of acquired intangibles (in years)	8 years
CUB | Common Stock
Business Acquisition [Line Items]
Cash payment for each share exchanged (in dollars per share) | $ / shares	$ 13.44
Fixed exchange ratio (in shares) | shares	0.7739
Shares issued for acquisition (in shares) | shares	2,870,975
CUB | CUB
Business Acquisition [Line Items]
Assets	$ 1,108,546
Loans	683,807
Deposits	$ 930,533
Kentucky | CUB | CUB
Business Acquisition [Line Items]
Number of banking offices | banking_office	15