Loans Receivable - Nonaccrual Loans (Details) - USD ($)		3 Months Ended
	Mar. 31, 2020	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Purchased with Credit Deterioration, Discount (Premium)	$ 2,500,000
Gross nonaccrual loans	34,163,000	$ 34,163,000		$ 44,525,000
Financing Receivable, Nonaccrual, No Allowance	31,020,000	31,020,000
Financing Receivable, Nonaccrual, with Allowance	3,143,000	3,143,000
Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross nonaccrual loans	33,908,000	33,908,000		44,320,000
Financing Receivable, Nonaccrual, No Allowance	31,001,000	31,001,000
Financing Receivable, Nonaccrual, with Allowance	2,907,000	2,907,000
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross nonaccrual loans	26,087,000	26,087,000		33,544,000
Financing Receivable, Nonaccrual, No Allowance	24,068,000	24,068,000
Financing Receivable, Nonaccrual, with Allowance	2,019,000	2,019,000
Commercial Portfolio Segment [Member] | Owner Occupied Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross nonaccrual loans	3,991,000	3,991,000		4,714,000
Financing Receivable, Nonaccrual, No Allowance	3,103,000	3,103,000
Financing Receivable, Nonaccrual, with Allowance	888,000	888,000
Commercial Portfolio Segment [Member] | Non Owner Occupied Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross nonaccrual loans	3,830,000	3,830,000		6,062,000
Financing Receivable, Nonaccrual, No Allowance	3,830,000	3,830,000
Financing Receivable, Nonaccrual, with Allowance	0	0
Residential Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross nonaccrual loans	163,000	163,000		19,000
Financing Receivable, Nonaccrual, No Allowance	19,000	19,000
Financing Receivable, Nonaccrual, with Allowance	144,000	144,000
Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross nonaccrual loans	92,000	92,000		$ 186,000
Financing Receivable, Nonaccrual, No Allowance	0	0
Financing Receivable, Nonaccrual, with Allowance	92,000	92,000
Nonaccrual [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Purchased with Credit Deterioration, Discount (Premium)	$ 565,000
Nonaccrual [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired Financing Receivable, Interest Income, Accrual Method		320,000	$ 0
Impaired Financing Receivable Interest Income Reversal Accrual Method		(16,000)
Nonaccrual [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired Financing Receivable, Interest Income, Accrual Method		310,000
Impaired Financing Receivable Interest Income Reversal Accrual Method		(16,000)
Nonaccrual [Member] | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired Financing Receivable, Interest Income, Accrual Method		219,000
Impaired Financing Receivable Interest Income Reversal Accrual Method		(16,000)
Nonaccrual [Member] | Commercial Portfolio Segment [Member] | Owner Occupied Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired Financing Receivable, Interest Income, Accrual Method		46,000
Impaired Financing Receivable Interest Income Reversal Accrual Method		0
Nonaccrual [Member] | Commercial Portfolio Segment [Member] | Non Owner Occupied Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired Financing Receivable, Interest Income, Accrual Method		45,000
Impaired Financing Receivable Interest Income Reversal Accrual Method		0
Nonaccrual [Member] | Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired Financing Receivable, Interest Income, Accrual Method		10,000
Impaired Financing Receivable Interest Income Reversal Accrual Method		$ 0