Loans - Impaired Loans - Recorded Investment, Unpaid Principal Balance and Related Allowance (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Recorded Investment
With no related allowance recorded	$ 20,358	$ 21,238
With an allowance recorded	240	1,049
Total impaired loans	20,598	22,287
Unpaid Principal Balance
With no related allowance recorded	23,280	25,321
With an allowance recorded	240	1,448
Total impaired loans	23,520	26,769
Related Allowance
With an allowance recorded	98	1,049
Commercial
Recorded Investment
With no related allowance recorded	216	240
Unpaid Principal Balance
With no related allowance recorded	368	388
Lease financing receivables
Recorded Investment
With no related allowance recorded	220	366
With an allowance recorded	240
Unpaid Principal Balance
With no related allowance recorded	245	371
With an allowance recorded	240
Related Allowance
With an allowance recorded	98
Real estate - commercial | Owner occupied general purpose
Recorded Investment
With no related allowance recorded	460	1,881
Unpaid Principal Balance
With no related allowance recorded	495	2,131
Real estate - commercial | Owner occupied special purpose
Recorded Investment
With no related allowance recorded	366	385
Unpaid Principal Balance
With no related allowance recorded	510	518
Real estate - commercial | Non-owner occupied general purpose
Recorded Investment
With no related allowance recorded	1,143	1,744
With an allowance recorded		246
Unpaid Principal Balance
With no related allowance recorded	1,425	2,010
With an allowance recorded		595
Related Allowance
With an allowance recorded		246
Real estate - commercial | Non-owner occupied special purpose
Recorded Investment
With no related allowance recorded		1,013
Unpaid Principal Balance
With no related allowance recorded		1,649
Real estate - commercial | Retail properties
Recorded Investment
With no related allowance recorded	1,144	1,179
Unpaid Principal Balance
With no related allowance recorded	1,209	1,235
Real estate - residential | Investor
Recorded Investment
With no related allowance recorded	1,576	1,841
Unpaid Principal Balance
With no related allowance recorded	2,065	2,308
Real estate - residential | Multifamily
Recorded Investment
With no related allowance recorded	4,824
Unpaid Principal Balance
With no related allowance recorded	4,965
Real estate - residential | Owner occupied
Recorded Investment
With no related allowance recorded	8,209	9,824
With an allowance recorded		803
Unpaid Principal Balance
With no related allowance recorded	9,543	11,391
With an allowance recorded		853
Related Allowance
With an allowance recorded		803
Real estate - residential | Revolving and junior liens
Recorded Investment
With no related allowance recorded	1,971	2,484
Unpaid Principal Balance
With no related allowance recorded	2,211	3,018
Consumer
Recorded Investment
With no related allowance recorded	9
Unpaid Principal Balance
With no related allowance recorded	9
Construction Loans | Real estate - commercial | Commercial speculative
Recorded Investment
With no related allowance recorded	68	74
Unpaid Principal Balance
With no related allowance recorded	79	81
Construction Loans | Real estate - commercial | All other
Recorded Investment
With no related allowance recorded	152	207
Unpaid Principal Balance
With no related allowance recorded	$ 156	$ 221