Fair Value of Assets and Liabilities - Fair Values of Financial Assets and Liabilities on Balance Sheets (Details) - USD ($) $ in Thousands		Mar. 31, 2022	Dec. 31, 2021
Assets:
Amortized Cost		$ 384,942	$ 374,415
Fair Value		347,978	369,955
Loans and leases, net of deferred fees and costs	[1]	4,547,153	4,481,600
Liabilities:
Debt securities held to maturity, allowance for credit loss		286	286
Loans and leases, allowance for credit losses		54,800	64,000
Reported Value Measurement
Assets:
Cash and cash equivalents		405,679	415,727
Amortized Cost		384,942	374,415
Federal Home Loan Bank ("FHLB") stock		17,308	17,308
Federal Reserve Bank ("FRB") stock		21,189	13,311
Total other investment securities at cost		38,497	30,619
Total other investments		41,503	33,643
Loans and leases, net of deferred fees and costs		4,547,153	4,481,600
Bank owned life insurance		73,789	73,358
Liabilities:
Deposits		6,002,926	5,862,552
Short-term borrowings		144,275	166,482
Long-term borrowings		201,610	99,475
Estimate of Fair Value Measurement
Assets:
Cash and cash equivalents		405,679	415,727
Fair Value		347,978	369,955
Federal Home Loan Bank ("FHLB") stock		17,308	17,308
Federal Reserve Bank ("FRB") stock		21,189	13,311
Total other investment securities at cost		38,497	30,619
Total other investments		41,503	33,643
Loans and leases, net of deferred fees and costs		4,361,994	4,510,605
Bank owned life insurance		73,789	73,358
Liabilities:
Deposits		5,297,652	5,546,552
Short-term borrowings		145,091	164,990
Long-term borrowings		206,652	101,664
U.S. government sponsored agencies
Assets:
Amortized Cost		38,486	36,431
Fair Value		34,281	35,513
Liabilities:
Debt securities held to maturity, allowance for credit loss		0	0
U.S. government sponsored agencies | Reported Value Measurement
Assets:
Amortized Cost		38,486	36,431
U.S. government sponsored agencies | Estimate of Fair Value Measurement
Assets:
Fair Value		34,281	35,513
States and political subdivisions
Assets:
Amortized Cost		151,503	151,688
Fair Value		133,694	150,138
Liabilities:
Debt securities held to maturity, allowance for credit loss		286	286
States and political subdivisions | Estimate of Fair Value Measurement
Assets:
Fair Value		133,694	150,138
Residential mortgage-backed securities
Assets:
Amortized Cost		115,613	110,708
Fair Value		108,199	110,159
Liabilities:
Debt securities held to maturity, allowance for credit loss		0	0
Residential mortgage-backed securities | Reported Value Measurement
Assets:
Amortized Cost		115,613	110,708
Residential mortgage-backed securities | Estimate of Fair Value Measurement
Assets:
Fair Value		108,199	110,159
Commercial mortgage-backed securities
Assets:
Amortized Cost		79,340	75,588
Fair Value		71,804	74,145
Liabilities:
Debt securities held to maturity, allowance for credit loss		0	0
Commercial mortgage-backed securities | Reported Value Measurement
Assets:
Amortized Cost		79,340	75,588
Commercial mortgage-backed securities | Estimate of Fair Value Measurement
Assets:
Fair Value		71,804	74,145
Nonqualified Plan | Reported Value Measurement
Assets:
Total other investment securities		2,222	2,240
Nonqualified Plan | Estimate of Fair Value Measurement
Assets:
Total other investment securities		2,222	2,240
Other Security Investments | Reported Value Measurement
Assets:
Total other investment securities		784	784
Other Security Investments | Estimate of Fair Value Measurement
Assets:
Total other investment securities		$ 784	$ 784

[1] Also referred to throughout this document as "total loans" and "loans held for investment."