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Loans - Impaired Loans - Recorded Investment, Unpaid Principal Balance and Related Allowance (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Recorded Investment
With no related allowance recorded	$ 7,083	$ 14,855
With an allowance recorded	9,642	5,257
Total impaired loans	16,725	20,112
Unpaid Principal Balance
With no related allowance recorded	9,015	17,792
With an allowance recorded	10,118	5,257
Total impaired loans	19,133	23,049
Related Allowance
With an allowance recorded	373	144
Lease financing receivables
Recorded Investment
With no related allowance recorded		178
Unpaid Principal Balance
With no related allowance recorded		213
Real estate - commercial | Owner occupied general purpose
Recorded Investment
With no related allowance recorded	1,614	455
With an allowance recorded	518
Unpaid Principal Balance
With no related allowance recorded	1,699	495
With an allowance recorded	518
Related Allowance
With an allowance recorded	46
Real estate - commercial | Owner occupied special purpose
Recorded Investment
With no related allowance recorded	409	342
Unpaid Principal Balance
With no related allowance recorded	538	498
Real estate - commercial | Non-owner occupied general purpose
Recorded Investment
With no related allowance recorded	142	1,163
Unpaid Principal Balance
With no related allowance recorded	158	1,538
Real estate - commercial | Non-owner occupied special purpose
Recorded Investment
With an allowance recorded	3,099
Unpaid Principal Balance
With an allowance recorded	3,575
Related Allowance
With an allowance recorded	139
Real estate - commercial | Retail properties
Recorded Investment
With no related allowance recorded		1,081
Unpaid Principal Balance
With no related allowance recorded		1,177
Real estate - residential | Investor
Recorded Investment
With no related allowance recorded	365	372
With an allowance recorded	810	829
Unpaid Principal Balance
With no related allowance recorded	466	676
With an allowance recorded	810	829
Related Allowance
With an allowance recorded	10	10
Real estate - residential | Multifamily
Recorded Investment
With no related allowance recorded		4,723
Unpaid Principal Balance
With no related allowance recorded		4,965
Real estate - residential | Owner occupied
Recorded Investment
With no related allowance recorded	3,855	5,208
With an allowance recorded	3,710	3,443
Unpaid Principal Balance
With no related allowance recorded	5,326	6,680
With an allowance recorded	3,710	3,443
Related Allowance
With an allowance recorded	49	43
Real estate - residential | Revolving and junior liens
Recorded Investment
With no related allowance recorded	634	1,125
With an allowance recorded	1,420	985
Unpaid Principal Balance
With no related allowance recorded	739	1,313
With an allowance recorded	1,420	985
Related Allowance
With an allowance recorded	61	91
Consumer
Recorded Investment
With no related allowance recorded	14	7
With an allowance recorded	26
Unpaid Principal Balance
With no related allowance recorded	15	8
With an allowance recorded	26
Related Allowance
With an allowance recorded	26
Construction Loans | Real estate - commercial | All other
Recorded Investment
With no related allowance recorded	50	201
With an allowance recorded	59
Unpaid Principal Balance
With no related allowance recorded	74	$ 229
With an allowance recorded	59
Related Allowance
With an allowance recorded	$ 42

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