Loans (Nonaccrual and Past Due Loans) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Jan. 01, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Nonaccrual	$ 25,482		$ 17,781
Financing Receivable, 90 Days or More Past Due, Still Accruing	1,543		3,932
Financing Receivable, Nonaccrual, Interest Income	458
Financing Receivable, Nonaccrual, No Allowance	0
Accounting Standards Update 2016-13 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, 90 Days or More Past Due, Still Accruing			3,900
One Commercial relationship [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, 90 Days or More Past Due, Still Accruing	2,500
Commercial real estate, other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Nonaccrual	99		411
Financing Receivable, 90 Days or More Past Due, Still Accruing	0		0
Financing Receivable, Allowance for Credit Loss	1,742		600
Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Nonaccrual	9,577		6,801
Financing Receivable, 90 Days or More Past Due, Still Accruing	0		907
Financing Receivable, Allowance for Credit Loss	12,142		7,193
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Nonaccrual	5,010		2,155
Financing Receivable, 90 Days or More Past Due, Still Accruing	806		155
Residential real estate | One Commercial relationship [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Nonaccrual	1,500
Home equity lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Nonaccrual	8,640		6,361
Financing Receivable, 90 Days or More Past Due, Still Accruing	557		2,677
Home Equity Line of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Nonaccrual	1,152		1,165
Financing Receivable, 90 Days or More Past Due, Still Accruing	143		108
Financing Receivable, Allowance for Credit Loss	1,695		1,570
Consumer, direct
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Nonaccrual	834		840
Financing Receivable, 90 Days or More Past Due, Still Accruing	0		0
Financing Receivable, Allowance for Credit Loss	10,878		5,389
Consumer, Other Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Nonaccrual	170		48
Financing Receivable, 90 Days or More Past Due, Still Accruing	37		85
Financing Receivable, Allowance for Credit Loss	$ 1,803		$ 856
Total loans | Accounting Standards Update 2016-13 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Allowance for Credit Loss		$ 5,769