Fair Value of Assets and Liabilities - Fair Values of Financial Assets and Liabilities on Balance Sheets (Details) - USD ($) $ in Thousands		Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Assets:
Carrying Amount		$ 675,647		$ 560,453
Fair Value		569,888		478,509
Loans and leases, net of deferred fees and costs, carrying amount	[1]	6,084,390		4,707,150
Liabilities:
Debt securities held to maturity, allowance for credit loss		238		241
Allowance for credit losses (on PCD loans)		62,924	$ 61,211	53,162	$ 52,866	$ 52,346	$ 63,967
Carrying Amount
Assets:
Carrying Amount		675,647		560,453
Federal Home Loan Bank ("FHLB") stock		33,808		26,605
Federal Reserve Bank ("FRB") stock		26,897		21,231
Banker's Bank of Kentucky ("BBKY") stock		445		355
Total other investment securities at cost		61,150		48,191
Total other investment securities		65,938		51,263
Carrying Amount | Level 1
Assets:
Cash and Cash Equivalents, Fair Value Disclosure		299,109		154,022
Carrying Amount | Level 2
Assets:
Bank owned life insurance		139,554		105,292
Liabilities:
Deposits		7,037,518		5,716,941
Short-term borrowings		585,437		500,138
Long-term borrowings		173,312		101,093
Carrying Amount | Level 3
Assets:
Loans and leases, net of deferred fees and costs, carrying amount		6,084,390		4,707,150
Fair Value
Assets:
Fair Value		569,888		478,509
Federal Home Loan Bank ("FHLB") stock		33,808		26,605
Federal Reserve Bank ("FRB") stock		26,897		21,231
Banker's Bank of Kentucky ("BBKY") stock		445		355
Total other investment securities at cost		61,150		48,191
Total other investment securities		65,938		51,263
Fair Value | Level 1
Assets:
Cash and Cash Equivalents, Fair Value Disclosure		299,109		154,022
Fair Value | Level 2
Assets:
Bank owned life insurance		139,554		105,292
Liabilities:
Deposits		5,992,880		4,682,491
Short-term borrowings		595,045		504,584
Long-term borrowings		176,156		101,992
Fair Value | Level 3
Assets:
Loans and leases, net of deferred fees and costs, fair value		5,808,484		4,516,695
U.S. government sponsored agencies
Assets:
Carrying Amount		174,699		132,366
Fair Value		160,985		123,020
Liabilities:
Debt securities held to maturity, allowance for credit loss		0		0
U.S. government sponsored agencies | Carrying Amount | Level 2
Assets:
Carrying Amount		174,699		132,366
U.S. government sponsored agencies | Fair Value | Level 2
Assets:
Fair Value		160,985		123,020
States and political subdivisions
Assets:
Carrying Amount		144,728		145,263
Fair Value		104,810		108,776
Liabilities:
Debt securities held to maturity, allowance for credit loss		238		241
States and political subdivisions | Level 2
Assets:
Carrying Amount		144,728		145,263
States and political subdivisions | Fair Value | Level 2
Assets:
Fair Value		104,810		108,776
Residential mortgage-backed securities
Assets:
Carrying Amount		248,627		176,215
Fair Value		218,970		157,998
Liabilities:
Debt securities held to maturity, allowance for credit loss		0		0
Residential mortgage-backed securities | Carrying Amount | Level 2
Assets:
Carrying Amount		248,627		176,215
Residential mortgage-backed securities | Fair Value | Level 2
Assets:
Fair Value		218,970		157,998
Commercial mortgage-backed securities
Assets:
Carrying Amount		107,593		106,609
Fair Value		85,123		88,715
Liabilities:
Debt securities held to maturity, allowance for credit loss		0		0
Commercial mortgage-backed securities | Carrying Amount | Level 2
Assets:
Carrying Amount		102,845		101,861
Commercial mortgage-backed securities | Carrying Amount | Level 3
Assets:
Carrying Amount		4,748		4,748
Commercial mortgage-backed securities | Fair Value | Level 2
Assets:
Fair Value		85,123		85,354
Commercial mortgage-backed securities | Fair Value | Level 3
Assets:
Fair Value		0		3,361
Nonqualified Plan | Carrying Amount | Level 1
Assets:
Total other investment securities		2,744		2,048
Nonqualified Plan | Fair Value | Level 1
Assets:
Total other investment securities		2,744		2,048
Other investment securities | Carrying Amount | Level 2
Assets:
Total other investment securities		2,044		1,024
Other investment securities | Fair Value | Level 2
Assets:
Total other investment securities		$ 2,044		$ 1,024

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