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Loans - Credit Quality (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Loans by risk rating
Total Loans	$ 1,834,949	$ 1,617,622	$ 1,594,191
Multifamily
Loans by risk rating
Total Loans	181,022	129,772
Commercial
Loans by risk rating
Total Loans	306,407	272,851	257,356
Lease financing receivables
Loans by risk rating
Total Loans	70,661	68,325	69,305
Real estate - commercial
Loans by risk rating
Total Loans			739,136
Real estate - commercial | Owner occupied general purpose
Loans by risk rating
Total Loans	166,951	145,858
Real estate - commercial | Owner occupied special purpose
Loans by risk rating
Total Loans	190,285	171,114
Real estate - commercial | Non-owner occupied general purpose
Loans by risk rating
Total Loans	297,889	274,959
Real estate - commercial | Non-owner occupied special purpose
Loans by risk rating
Total Loans	88,270	93,171
Real estate - commercial | Retail properties
Loans by risk rating
Total Loans	46,876	50,619
Real estate - commercial | Farm
Loans by risk rating
Total Loans	13,913	15,270
Real estate - residential
Loans by risk rating
Total Loans			303,080
Real estate - residential | Investor
Loans by risk rating
Total Loans	71,418	55,620
Real estate - residential | Owner occupied
Loans by risk rating
Total Loans	141,158	128,005
Consumer
Loans by risk rating
Total Loans			116,503
All other
Loans by risk rating
Total Loans	14,317	14,063	13,943
Pass
Loans by risk rating
Total Loans	1,776,635	1,583,352
Pass | Multifamily
Loans by risk rating
Total Loans	177,845	125,049
Pass | Commercial
Loans by risk rating
Total Loans	303,176	270,889
Pass | Lease financing receivables
Loans by risk rating
Total Loans	70,661	67,500
Pass | Real estate - commercial | Owner occupied general purpose
Loans by risk rating
Total Loans	160,999	142,843
Pass | Real estate - commercial | Owner occupied special purpose
Loans by risk rating
Total Loans	183,375	169,621
Pass | Real estate - commercial | Non-owner occupied general purpose
Loans by risk rating
Total Loans	289,438	271,731
Pass | Real estate - commercial | Non-owner occupied special purpose
Loans by risk rating
Total Loans	83,648	89,582
Pass | Real estate - commercial | Retail properties
Loans by risk rating
Total Loans	45,074	48,321
Pass | Real estate - commercial | Farm
Loans by risk rating
Total Loans	11,423	11,755
Pass | Real estate - residential | Investor
Loans by risk rating
Total Loans	70,315	55,172
Pass | Real estate - residential | Owner occupied
Loans by risk rating
Total Loans	135,625	122,178
Pass | All other
Loans by risk rating
Total Loans	14,262	14,043
Special Mention
Loans by risk rating
Total Loans	13,357	10,965
Special Mention | Commercial
Loans by risk rating
Total Loans	2,878	1,962
Special Mention | Real estate - commercial | Owner occupied general purpose
Loans by risk rating
Total Loans	1,489	1,927
Special Mention | Real estate - commercial | Owner occupied special purpose
Loans by risk rating
Total Loans	2,883	1,152
Special Mention | Real estate - commercial | Non-owner occupied general purpose
Loans by risk rating
Total Loans	834	2,065
Special Mention | Real estate - commercial | Non-owner occupied special purpose
Loans by risk rating
Total Loans	1,523
Special Mention | Real estate - commercial | Retail properties
Loans by risk rating
Total Loans		1,217
Special Mention | Real estate - commercial | Farm
Loans by risk rating
Total Loans	1,249	1,029
Special Mention | Real estate - residential | Owner occupied
Loans by risk rating
Total Loans	511	561
Substandard
Loans by risk rating
Total Loans	44,957	23,305
Substandard | Multifamily
Loans by risk rating
Total Loans	3,177	4,723
Substandard | Commercial
Loans by risk rating
Total Loans	353
Substandard | Lease financing receivables
Loans by risk rating
Total Loans		825
Substandard | Real estate - commercial | Owner occupied general purpose
Loans by risk rating
Total Loans	4,463	1,088
Substandard | Real estate - commercial | Owner occupied special purpose
Loans by risk rating
Total Loans	4,027	341
Substandard | Real estate - commercial | Non-owner occupied general purpose
Loans by risk rating
Total Loans	7,617	1,163
Substandard | Real estate - commercial | Non-owner occupied special purpose
Loans by risk rating
Total Loans	3,099	3,589
Substandard | Real estate - commercial | Retail properties
Loans by risk rating
Total Loans	1,802	1,081
Substandard | Real estate - commercial | Farm
Loans by risk rating
Total Loans	1,241	2,486
Substandard | Real estate - residential | Investor
Loans by risk rating
Total Loans	1,103	448
Substandard | Real estate - residential | Owner occupied
Loans by risk rating
Total Loans	5,022	5,266
Substandard | All other
Loans by risk rating
Total Loans	55	20
PCI
Loans by risk rating
Total Loans	10,887
PCI | Substandard
Loans by risk rating
Total Loans	10,887
Non-PCI
Loans by risk rating
Total Loans	1,824,062	1,617,622
Non-PCI | Pass
Loans by risk rating
Total Loans	1,776,635
Non-PCI | Special Mention
Loans by risk rating
Total Loans	13,357
Non-PCI | Substandard
Loans by risk rating
Total Loans	34,070
Construction Loans | Real estate - commercial
Loans by risk rating
Total Loans			$ 94,868
Construction Loans | Real estate - commercial | Homebuilder
Loans by risk rating
Total Loans	4,556	2,350
Construction Loans | Real estate - commercial | Land
Loans by risk rating
Total Loans	3,841	2,443
Construction Loans | Real estate - commercial | Commercial speculative
Loans by risk rating
Total Loans	56,052	32,028
Construction Loans | Real estate - commercial | All other
Loans by risk rating
Total Loans	48,424	48,341
Construction Loans | Pass | Real estate - commercial | Homebuilder
Loans by risk rating
Total Loans	4,556	2,350
Construction Loans | Pass | Real estate - commercial | Land
Loans by risk rating
Total Loans	3,841	2,443
Construction Loans | Pass | Real estate - commercial | Commercial speculative
Loans by risk rating
Total Loans	56,052	32,028
Construction Loans | Pass | Real estate - commercial | All other
Loans by risk rating
Total Loans	46,152	46,913
Construction Loans | Special Mention | Real estate - commercial | All other
Loans by risk rating
Total Loans	1,990	1,052
Construction Loans | Substandard | Real estate - commercial | All other
Loans by risk rating
Total Loans	282	376
Home Equity Line of Credit | Real estate - residential
Loans by risk rating
Total Loans	122,022	112,833
Home Equity Line of Credit | Pass | Real estate - residential
Loans by risk rating
Total Loans	120,193	110,934
Home Equity Line of Credit | Substandard | Real estate - residential
Loans by risk rating
Total Loans	$ 1,829	$ 1,899

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Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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