COVID-19 Pandemic Implications (Narrative) (Details)			3 Months Ended
	May 08, 2020 USD ($) Customer	May 07, 2020 USD ($) Borrower Customer	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Mar. 31, 2019 USD ($)
Unusual Risk Or Uncertainty [Line Items]
Loans and leases receivable, gross, carrying amount			$ 1,798,149,000	$ 1,762,756,000	$ 1,646,686,000
Subsequent Event [Member]
Unusual Risk Or Uncertainty [Line Items]
Loan modifications to number of borrowers affected by Covid | Borrower		479
Subsequent Event [Member] | COVID-19 Pandemic Implications [Member]
Unusual Risk Or Uncertainty [Line Items]
Loans and leases receivable, gross, carrying amount		$ 201,522,000
Subsequent Event [Member] | Minimum [Member] | COVID-19 Pandemic Implications [Member]
Unusual Risk Or Uncertainty [Line Items]
Modification from deferrals of principal and interest payments		3 months
Borrowers reverting to interest only payments		3 months
Subsequent Event [Member] | Maximum [Member] | COVID-19 Pandemic Implications [Member]
Unusual Risk Or Uncertainty [Line Items]
Modification from deferrals of principal and interest payments		6 months
Borrowers reverting to interest only payments		6 months
PPP Loans [Member] | Small Business Administration [Member]
Unusual Risk Or Uncertainty [Line Items]
Loan guarantee description			All PPP loans are 100% guaranteed by the Small Business Administration, and from the disbursements made through May 7, 2020
PPP Loans [Member] | Small Business Administration [Member] | Subsequent Event [Member]
Unusual Risk Or Uncertainty [Line Items]
Loan funding approved		$ 598,463,000
Loans and leases receivable, gross, carrying amount	$ 587,543,000
Number of business customers | Customer		3,552
Number of business customers loan disbursed | Customer	3,282
Related party loans account		$ 16,312,000
Guarantee percentage of loan		100.00%
Loan processing fees		$ 19,893,000