Allowance For Credit Losses for Loans - Prior Period Past Due and Nonaccrual (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Schedule of Aging of Financing Receivables
Total loans		$ 3,087,246
Total Past Due Loans	$ 11,129
Current  Loans	3,098,231	3,057,758
Non-accrual Loans	35,630	38,050
30-59 Days Past Due
Schedule of Aging of Financing Receivables
Total loans		20,880
60-89 Days Past Due
Schedule of Aging of Financing Receivables
Total loans		513
Past Due 90 days or more
Schedule of Aging of Financing Receivables
Total loans		8,095
Total Past Due Loans		29,488
Commercial real estate
Schedule of Aging of Financing Receivables
Total loans		1,478,235
Total Past Due Loans	7,075
Current  Loans	1,509,212	1,466,039
Non-accrual Loans	27,193	29,680
Commercial real estate | 30-59 Days Past Due
Schedule of Aging of Financing Receivables
Total loans		6,105
Commercial real estate | 60-89 Days Past Due
Schedule of Aging of Financing Receivables
Total loans		499
Commercial real estate | Past Due 90 days or more
Schedule of Aging of Financing Receivables
Total loans		5,592
Total Past Due Loans		12,196
Commercial and industrial
Schedule of Aging of Financing Receivables
Total loans		435,660
Total Past Due Loans	974
Current  Loans	416,462	434,623
Non-accrual Loans	4,735	4,574
Commercial and industrial | 30-59 Days Past Due
Schedule of Aging of Financing Receivables
Total loans		417
Commercial and industrial | 60-89 Days Past Due
Schedule of Aging of Financing Receivables
Total loans		13
Commercial and industrial | Past Due 90 days or more
Schedule of Aging of Financing Receivables
Total loans		607
Total Past Due Loans		1,037
Commercial construction
Schedule of Aging of Financing Receivables
Total loans		373,309
Total Past Due Loans	1,398
Current  Loans	352,457	358,492
Non-accrual Loans	2,945	2,999
Commercial construction | 30-59 Days Past Due
Schedule of Aging of Financing Receivables
Total loans		13,466
Commercial construction | 60-89 Days Past Due
Schedule of Aging of Financing Receivables
Total loans		0
Commercial construction | Past Due 90 days or more
Schedule of Aging of Financing Receivables
Total loans		1,351
Total Past Due Loans		14,817
SBA paycheck protection program
Schedule of Aging of Financing Receivables
Total loans		453,084
Total Past Due Loans	0
Current  Loans	484,175	453,084
Non-accrual Loans	0	0
SBA paycheck protection program | 30-59 Days Past Due
Schedule of Aging of Financing Receivables
Total loans		0
SBA paycheck protection program | 60-89 Days Past Due
Schedule of Aging of Financing Receivables
Total loans		0
SBA paycheck protection program | Past Due 90 days or more
Schedule of Aging of Financing Receivables
Total loans		0
Total Past Due Loans		0
Residential mortgages
Schedule of Aging of Financing Receivables
Total loans		252,971
Total Past Due Loans	1,460
Current  Loans	246,131	251,791
Non-accrual Loans	398	414
Residential mortgages | 30-59 Days Past Due
Schedule of Aging of Financing Receivables
Total loans		890
Residential mortgages | 60-89 Days Past Due
Schedule of Aging of Financing Receivables
Total loans		0
Residential mortgages | Past Due 90 days or more
Schedule of Aging of Financing Receivables
Total loans		290
Total Past Due Loans		1,180
Home equity loans and lines
Schedule of Aging of Financing Receivables
Total loans		85,006
Total Past Due Loans	215
Current  Loans	81,222	84,751
Non-accrual Loans	358	381
Home equity loans and lines | 30-59 Days Past Due
Schedule of Aging of Financing Receivables
Total loans		0
Home equity loans and lines | 60-89 Days Past Due
Schedule of Aging of Financing Receivables
Total loans		0
Home equity loans and lines | Past Due 90 days or more
Schedule of Aging of Financing Receivables
Total loans		255
Total Past Due Loans		255
Consumer
Schedule of Aging of Financing Receivables
Total loans		8,981
Total Past Due Loans	7
Current  Loans	8,572	8,978
Non-accrual Loans	$ 1	2
Consumer | 30-59 Days Past Due
Schedule of Aging of Financing Receivables
Total loans		2
Consumer | 60-89 Days Past Due
Schedule of Aging of Financing Receivables
Total loans		1
Consumer | Past Due 90 days or more
Schedule of Aging of Financing Receivables
Total loans		0
Total Past Due Loans		$ 3