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Loans - Aging Analysis (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Aged analysis of past due loans
Total Past Due	$ 7,955	$ 13,358
Current	1,878,208	1,867,663
Nonaccrual	13,648	16,006
Total Loans	1,899,811	1,897,027	$ 1,834,949
Total Loans	1,899,811
Recorded Investment 90 days or Greater Past Due and Accruing	19	935
30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	5,732	10,617
60 to 89 Days Past Due
Aged analysis of past due loans
Total Past Due	2,205	1,824
90 Days or Greater Past Due
Aged analysis of past due loans
Total Past Due	18	917
PCI
Aged analysis of past due loans
Total Past Due	865	1,452
Current	6,474	7,248
Nonaccrual	1,796	2,265
Total Loans	9,135	10,965
PCI | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	865	1,452
Non-PCI
Aged analysis of past due loans
Total Past Due	7,090	11,906
Current	1,871,734	1,860,415
Nonaccrual	11,852	13,741
Total Loans	1,890,676	1,886,062
Recorded Investment 90 days or Greater Past Due and Accruing	19	935
Non-PCI | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	4,867	9,165
Non-PCI | 60 to 89 Days Past Due
Aged analysis of past due loans
Total Past Due	2,205	1,824
Non-PCI | 90 Days or Greater Past Due
Aged analysis of past due loans
Total Past Due	18	917
Multifamily
Aged analysis of past due loans
Total Past Due	1	724
Current	183,475	195,504
Total Loans	183,476	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	1	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		410
Current	333,516	313,913
Nonaccrual	148
Total Loans	333,664	314,323
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		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
Current	108,078	78,806
Nonaccrual	74
Total Loans	108,152	78,806	70,661
Commercial Real Estate Portfolio Segment [Member]
Aged analysis of past due loans
Total Loans			808,310
Total Loans	830,713
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied General Purpose Loan [Member]
Aged analysis of past due loans
Total Past Due	2,613	1,801
Current	140,928	160,892
Nonaccrual	1,183	1,579
Total Loans	144,724	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	1,397	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	1,216
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	1,509	961
Current	173,835	192,426
Nonaccrual	1,591	395
Total Loans	176,935	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	1,416	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	93	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	623	3,035
Current	328,870	286,115
Nonaccrual	564	4,236
Total Loans	330,057	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	623	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		203
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Non Owner Occupied Special Purpose Loan [Member]
Aged analysis of past due loans
Current	106,043	106,036
Nonaccrual	2,960	3,099
Total Loans	109,003	109,135
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Retail Properties Loan [Member]
Aged analysis of past due loans
Total Past Due	597	620
Current	51,015	45,968
Nonaccrual	1,122
Total Loans	52,734	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	597
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	13,327	13,778
Total Loans	13,327	13,778
Commercial Real Estate Portfolio Segment [Member] | Construction Loans
Aged analysis of past due loans
Total Loans			113,651
Total Loans	91,703
Commercial Real Estate Portfolio Segment [Member] | Construction Loans | Construction Real Estate, Homebuilder Loan [Member]
Aged analysis of past due loans
Total Past Due	93
Current	5,142	5,102
Total Loans	5,235	5,102
Commercial Real Estate Portfolio Segment [Member] | Construction Loans | Construction Real Estate, Homebuilder Loan [Member] | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	93
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	12,258	2,478
Total Loans	12,258	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
Current	51,991	55,060
Total Loans	51,991	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] | 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	21,488	45,028
Nonaccrual	94	106
Total Loans	21,582	45,134
Residential Portfolio Segment [Member]
Aged analysis of past due loans
Total Loans			399,581
Total Loans	393,076
Residential Portfolio Segment [Member] | Residential Investor Loan [Member]
Aged analysis of past due loans
Total Past Due	496	957
Current	68,114	69,148
Nonaccrual	379	353
Total Loans	68,989	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		801
Residential Portfolio Segment [Member] | Residential Investor Loan [Member] | 60 to 89 Days Past Due
Aged analysis of past due loans
Total Past Due	496	156
Residential Portfolio Segment [Member] | Residential Owner Occupied Loan [Member]
Aged analysis of past due loans
Total Past Due	413	1,946
Current	132,933	135,360
Nonaccrual	2,700	3,076
Total Loans	136,046	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	106	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	307	705
Residential Portfolio Segment [Member] | Home Equity Line of Credit
Aged analysis of past due loans
Total Past Due	738	775
Current	124,556	138,801
Nonaccrual	1,015	866
Total Loans	126,309	140,442
Recorded Investment 90 days or Greater Past Due and Accruing	19
Residential Portfolio Segment [Member] | Home Equity Line of Credit | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	627	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	93
Residential Portfolio Segment [Member] | Home Equity Line of Credit | 90 Days or Greater Past Due
Aged analysis of past due loans
Total Past Due	18
Consumer Portfolio Segment [Member]
Aged analysis of past due loans
Total Loans			122,022
Total Loans	126,309
Unallocated Financing Receivables [Member]
Aged analysis of past due loans
Total Past Due	7	61
Current	16,165	16,000
Nonaccrual	22	31
Total Loans	16,194	16,092	$ 14,317
Total Loans	16,194
Recorded Investment 90 days or Greater Past Due and Accruing		3
Unallocated Financing Receivables [Member] | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	$ 7	53
Unallocated Financing Receivables [Member] | 60 to 89 Days Past Due
Aged analysis of past due loans
Total Past Due		5
Unallocated Financing Receivables [Member] | 90 Days or Greater Past Due
Aged analysis of past due loans
Total Past Due		$ 3

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