Loans and Allowance for Credit Losses on Loans - Aging of Past Due Loans by Class of Loans (Details) - USD ($)	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Aging of Past Due Loans by Class of Loans
Loan balance	$ 3,261,915,000	$ 3,298,550,000	$ 3,024,064,000
Total	3,262,427,000	3,299,067,000
30-59 Days Past Due
Aging of Past Due Loans by Class of Loans
Loan balance	15,404,000	11,690,000
60-89 Days Past Due
Aging of Past Due Loans by Class of Loans
Loan balance	3,888,000	3,337,000
90 Days or Greater Past Due
Aging of Past Due Loans by Class of Loans
Loan balance	1,772,000	2,039,000
Past due
Aging of Past Due Loans by Class of Loans
Loan balance	21,064,000	17,066,000
Current
Aging of Past Due Loans by Class of Loans
Loan balance	3,241,363,000	3,282,001,000
Commercial
Aging of Past Due Loans by Class of Loans
Total	506,602,000	533,915,000
Commercial | Commercial.
Aging of Past Due Loans by Class of Loans
Total	506,602,000	533,915,000
Commercial | Commercial. | 30-59 Days Past Due
Aging of Past Due Loans by Class of Loans
Loan balance	7,756,000	7,236,000
Commercial | Commercial. | 60-89 Days Past Due
Aging of Past Due Loans by Class of Loans
Loan balance	2,239,000	2,519,000
Commercial | Commercial. | 90 Days or Greater Past Due
Aging of Past Due Loans by Class of Loans
Loan balance	436,000	703,000
Commercial | Commercial. | Past due
Aging of Past Due Loans by Class of Loans
Loan balance	10,431,000	10,458,000
Commercial | Commercial. | Current
Aging of Past Due Loans by Class of Loans
Loan balance	496,171,000	523,457,000
CRE - Owner Occupied
Aging of Past Due Loans by Class of Loans
Total	603,298,000	614,663,000
CRE - Owner Occupied | Real estate
Aging of Past Due Loans by Class of Loans
Total	603,298,000	614,663,000
CRE - Owner Occupied | Real estate | 30-59 Days Past Due
Aging of Past Due Loans by Class of Loans
Loan balance	1,121,000	252,000
CRE - Owner Occupied | Real estate | Past due
Aging of Past Due Loans by Class of Loans
Loan balance	1,121,000	252,000
CRE - Owner Occupied | Real estate | Current
Aging of Past Due Loans by Class of Loans
Loan balance	602,177,000	614,411,000
CRE - Non-Owner Occupied
Aging of Past Due Loans by Class of Loans
Total	1,083,852,000	1,066,368,000
CRE - Non-Owner Occupied | Real estate
Aging of Past Due Loans by Class of Loans
Total	1,083,852,000	1,066,368,000
CRE - Non-Owner Occupied | Real estate | 90 Days or Greater Past Due
Aging of Past Due Loans by Class of Loans
Loan balance	1,336,000	1,336,000
CRE - Non-Owner Occupied | Real estate | Past due
Aging of Past Due Loans by Class of Loans
Loan balance	1,336,000	1,336,000
CRE - Non-Owner Occupied | Real estate | Current
Aging of Past Due Loans by Class of Loans
Loan balance	1,082,516,000	1,065,032,000
Land & Construction
Aging of Past Due Loans by Class of Loans
Total	166,408,000	163,577,000
Land & Construction | Real estate
Aging of Past Due Loans by Class of Loans
Total	166,408,000	163,577,000
Land & Construction | Real estate | Current
Aging of Past Due Loans by Class of Loans
Loan balance	166,408,000	163,577,000
Home Equity
Aging of Past Due Loans by Class of Loans
Total	124,481,000	120,724,000
Home Equity | Real estate
Aging of Past Due Loans by Class of Loans
Total	124,481,000	120,724,000
Home Equity | Real estate | 30-59 Days Past Due
Aging of Past Due Loans by Class of Loans
Loan balance	96,000
Home Equity | Real estate | 60-89 Days Past Due
Aging of Past Due Loans by Class of Loans
Loan balance		98,000
Home Equity | Real estate | Past due
Aging of Past Due Loans by Class of Loans
Loan balance	96,000	98,000
Home Equity | Real estate | Current
Aging of Past Due Loans by Class of Loans
Loan balance	124,385,000	120,626,000
Multi-Family
Aging of Past Due Loans by Class of Loans
Total	231,242,000	244,882,000
Multi-Family | Real estate
Aging of Past Due Loans by Class of Loans
Total	231,242,000	244,882,000
Multi-Family | Real estate | Current
Aging of Past Due Loans by Class of Loans
Loan balance	231,242,000	244,882,000
Residential Mortgage
Aging of Past Due Loans by Class of Loans
Total	528,639,000	537,905,000
Residential Mortgage | Real estate
Aging of Past Due Loans by Class of Loans
Total	528,639,000	537,905,000
Residential Mortgage | Real estate | 30-59 Days Past Due
Aging of Past Due Loans by Class of Loans
Loan balance	6,431,000	4,202,000
Residential Mortgage | Real estate | 60-89 Days Past Due
Aging of Past Due Loans by Class of Loans
Loan balance	1,649,000	720,000
Residential Mortgage | Real estate | Past due
Aging of Past Due Loans by Class of Loans
Loan balance	8,080,000	4,922,000
Residential Mortgage | Real estate | Current
Aging of Past Due Loans by Class of Loans
Loan balance	520,559,000	532,983,000
Consumer and Other
Aging of Past Due Loans by Class of Loans
Total	17,905,000	17,033,000
Consumer and Other | Consumer
Aging of Past Due Loans by Class of Loans
Total	17,905,000	17,033,000
Consumer and Other | Consumer | Current
Aging of Past Due Loans by Class of Loans
Loan balance	$ 17,905,000	$ 17,033,000