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Loans - Aging Analysis (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Aged analysis of past due loans
Total Past Due	$ 9,420	$ 13,358
Current	1,878,110	1,867,663
Nonaccrual	15,616	16,006
Total Loans	1,903,146	1,897,027	$ 1,601,812
Total Loans	1,903,146
Recorded Investment 90 days or Greater Past Due and Accruing	4	935
30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	6,178	10,617
60 to 89 Days Past Due
Aged analysis of past due loans
Total Past Due	3,238	1,824
90 Days or Greater Past Due
Aged analysis of past due loans
Total Past Due	4	917
PCI
Aged analysis of past due loans
Total Past Due	1,872	1,452
Current	6,746	7,248
Nonaccrual	2,233	2,265
Total Loans	10,851	10,965
PCI | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	1,872	1,452
Non-PCI
Aged analysis of past due loans
Total Past Due	7,548	11,906
Current	1,871,364	1,860,415
Nonaccrual	13,383	13,741
Total Loans	1,892,295	1,886,062
Recorded Investment 90 days or Greater Past Due and Accruing	4	935
Non-PCI | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	4,306	9,165
Non-PCI | 60 to 89 Days Past Due
Aged analysis of past due loans
Total Past Due	3,238	1,824
Non-PCI | 90 Days or Greater Past Due
Aged analysis of past due loans
Total Past Due	4	917
Multifamily
Aged analysis of past due loans
Total Past Due		724
Current	190,478	195,504
Total Loans	190,478	196,228
Recorded Investment 90 days or Greater Past Due and Accruing		180
Multifamily | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due		545
Multifamily | 90 Days or Greater Past Due
Aged analysis of past due loans
Total Past Due		179
Commercial Portfolio Segment [Member]
Aged analysis of past due loans
Total Past Due	10	410
Current	324,440	313,913
Total Loans	324,450	314,323	281,134
Total Loans	324,450
Recorded Investment 90 days or Greater Past Due and Accruing		361
Commercial Portfolio Segment [Member] | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	10	58
Commercial Portfolio Segment [Member] | 90 Days or Greater Past Due
Aged analysis of past due loans
Total Past Due		352
Finance Leases Financing Receivable [Member]
Aged analysis of past due loans
Total Past Due	110
Current	87,506	78,806
Nonaccrual	114
Total Loans	87,730	78,806	66,344
Total Loans	87,730
Finance Leases Financing Receivable [Member] | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	110
Commercial Real Estate Portfolio Segment [Member]
Aged analysis of past due loans
Total Loans			713,422
Total Loans	840,006
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied General Purpose Loan [Member]
Aged analysis of past due loans
Total Past Due	439	1,801
Current	155,821	160,892
Nonaccrual	1,732	1,579
Total Loans	157,992	164,272
Recorded Investment 90 days or Greater Past Due and Accruing		36
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied General Purpose Loan [Member] | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	349	1,768
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied General Purpose Loan [Member] | 60 to 89 Days Past Due
Aged analysis of past due loans
Total Past Due	90
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied General Purpose Loan [Member] | 90 Days or Greater Past Due
Aged analysis of past due loans
Total Past Due		33
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Owner Occupied Special Purpose Loan [Member]
Aged analysis of past due loans
Total Past Due	2,620	961
Current	188,132	192,426
Nonaccrual	516	395
Total Loans	191,268	193,782
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Owner Occupied Special Purpose Loan [Member] | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	599	826
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Owner Occupied Special Purpose Loan [Member] | 60 to 89 Days Past Due
Aged analysis of past due loans
Total Past Due	2,021	135
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Non Owner Occupied General Purpose Loan [Member]
Aged analysis of past due loans
Total Past Due	1,153	3,035
Current	317,566	286,115
Nonaccrual	3,486	4,236
Total Loans	322,205	293,386
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Non Owner Occupied General Purpose Loan [Member] | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	775	2,832
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Non Owner Occupied General Purpose Loan [Member] | 60 to 89 Days Past Due
Aged analysis of past due loans
Total Past Due	378	203
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Non Owner Occupied Special Purpose Loan [Member]
Aged analysis of past due loans
Current	97,074	106,036
Nonaccrual	2,960	3,099
Total Loans	100,034	109,135
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Retail Properties Loan [Member]
Aged analysis of past due loans
Total Past Due	1,159	620
Current	49,441	45,968
Total Loans	50,600	46,588
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Retail Properties Loan [Member] | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	1,159
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Retail Properties Loan [Member] | 60 to 89 Days Past Due
Aged analysis of past due loans
Total Past Due		620
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Farm Loan [Member]
Aged analysis of past due loans
Current	13,805	13,778
Total Loans	13,805	13,778
Commercial Real Estate Portfolio Segment [Member] | Construction Loans
Aged analysis of past due loans
Total Loans			91,479
Total Loans	95,497
Commercial Real Estate Portfolio Segment [Member] | Construction Loans | Construction Real Estate, Homebuilder Loan [Member]
Aged analysis of past due loans
Current	4,456	5,102
Total Loans	4,456	5,102
Commercial Real Estate Portfolio Segment [Member] | Construction Loans | Construction Real Estate, Land Loan [Member]
Aged analysis of past due loans
Total Past Due		266
Current	2,686	2,478
Total Loans	2,686	2,744
Commercial Real Estate Portfolio Segment [Member] | Construction Loans | Construction Real Estate, Land Loan [Member] | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due		266
Commercial Real Estate Portfolio Segment [Member] | Construction Loans | Construction Real Estate, Commercial Speculative Loan [Member]
Aged analysis of past due loans
Total Past Due	350	350
Current	54,503	55,060
Total Loans	54,853	55,410
Recorded Investment 90 days or Greater Past Due and Accruing		355
Commercial Real Estate Portfolio Segment [Member] | Construction Loans | Construction Real Estate, Commercial Speculative Loan [Member] | 60 to 89 Days Past Due
Aged analysis of past due loans
Total Past Due	350
Commercial Real Estate Portfolio Segment [Member] | Construction Loans | Construction Real Estate, Commercial Speculative Loan [Member] | 90 Days or Greater Past Due
Aged analysis of past due loans
Total Past Due		350
Commercial Real Estate Portfolio Segment [Member] | Construction Loans | Construction Real Estate, Other Receivable [Member]
Aged analysis of past due loans
Current	32,689	45,028
Nonaccrual	103	106
Total Loans	32,792	45,134
Residential Portfolio Segment [Member]
Aged analysis of past due loans
Total Loans			309,376
Total Loans	405,905
Residential Portfolio Segment [Member] | Residential Investor Loan [Member]
Aged analysis of past due loans
Total Past Due	803	957
Current	68,650	69,148
Nonaccrual	337	353
Total Loans	69,790	70,458
Residential Portfolio Segment [Member] | Residential Investor Loan [Member] | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	803	801
Residential Portfolio Segment [Member] | Residential Investor Loan [Member] | 60 to 89 Days Past Due
Aged analysis of past due loans
Total Past Due		156
Residential Portfolio Segment [Member] | Residential Owner Occupied Loan [Member]
Aged analysis of past due loans
Total Past Due	292	1,946
Current	136,177	135,360
Nonaccrual	3,129	3,076
Total Loans	139,598	140,382
Residential Portfolio Segment [Member] | Residential Owner Occupied Loan [Member] | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	282	1,241
Residential Portfolio Segment [Member] | Residential Owner Occupied Loan [Member] | 60 to 89 Days Past Due
Aged analysis of past due loans
Total Past Due	10	705
Residential Portfolio Segment [Member] | Home Equity Line of Credit
Aged analysis of past due loans
Total Past Due	571	775
Current	132,310	138,801
Nonaccrual	978	866
Total Loans	133,859	140,442
Recorded Investment 90 days or Greater Past Due and Accruing	1
Residential Portfolio Segment [Member] | Home Equity Line of Credit | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	211	775
Residential Portfolio Segment [Member] | Home Equity Line of Credit | 60 to 89 Days Past Due
Aged analysis of past due loans
Total Past Due	359
Residential Portfolio Segment [Member] | Home Equity Line of Credit | 90 Days or Greater Past Due
Aged analysis of past due loans
Total Past Due	1
Consumer Portfolio Segment [Member]
Aged analysis of past due loans
Total Loans			129,234
Total Loans	133,859
Unallocated Financing Receivables [Member]
Aged analysis of past due loans
Total Past Due	41	61
Current	15,630	16,000
Nonaccrual	28	31
Total Loans	15,699	16,092	$ 10,823
Total Loans	15,699
Recorded Investment 90 days or Greater Past Due and Accruing	3	3
Unallocated Financing Receivables [Member] | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	8	53
Unallocated Financing Receivables [Member] | 60 to 89 Days Past Due
Aged analysis of past due loans
Total Past Due	30	5
Unallocated Financing Receivables [Member] | 90 Days or Greater Past Due
Aged analysis of past due loans
Total Past Due	$ 3	$ 3

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