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Loans - Aging Analysis (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Aged analysis of past due loans
Total Past Due	$ 3,402	$ 5,606
Current	1,587,351	1,597,628
Nonaccrual	11,059	14,388
Total Loans	1,601,812	1,617,622	$ 1,488,021
Recorded Investment 90 days or Greater Past Due and Accruing	409	254
30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	2,821	4,212
60 to 89 Days Past Due
Aged analysis of past due loans
Total Past Due	180	1,146
90 Days or Greater Past Due
Aged analysis of past due loans
Total Past Due	401	248
Multifamily
Aged analysis of past due loans
Total Past Due	338
Current	125,086	125,049
Nonaccrual		4,723
Total Loans	125,424	129,772
Multifamily | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	338
Commercial
Aged analysis of past due loans
Total Past Due	332	1,270
Current	280,802	271,581
Total Loans	281,134	272,851	233,922
Commercial | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	332	995
Commercial | 60 to 89 Days Past Due
Aged analysis of past due loans
Total Past Due		275
Lease financing receivables
Aged analysis of past due loans
Total Past Due	152
Current	66,192	68,147
Nonaccrual		178
Total Loans	66,344	68,325	64,607
Lease financing receivables | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	152
Real estate - commercial
Aged analysis of past due loans
Total Loans	713,422		713,358
Real estate - commercial | Owner occupied general purpose
Aged analysis of past due loans
Total Past Due	63	1,136
Current	141,540	144,267
Nonaccrual	683	455
Total Loans	142,286	145,858
Real estate - commercial | Owner occupied general purpose | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	63	1,136
Real estate - commercial | Owner occupied special purpose
Aged analysis of past due loans
Total Past Due	744	226
Current	165,104	170,546
Nonaccrual	440	342
Total Loans	166,288	171,114
Real estate - commercial | Owner occupied special purpose | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	744	226
Real estate - commercial | Non-owner occupied general purpose
Aged analysis of past due loans
Total Past Due	441	593
Current	253,748	273,203
Nonaccrual	42	1,163
Total Loans	254,231	274,959
Real estate - commercial | Non-owner occupied general purpose | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	330
Real estate - commercial | Non-owner occupied general purpose | 60 to 89 Days Past Due
Aged analysis of past due loans
Total Past Due	111	593
Real estate - commercial | Non-owner occupied special purpose
Aged analysis of past due loans
Total Past Due		248
Current	88,642	92,923
Nonaccrual	3,575
Total Loans	92,217	93,171
Recorded Investment 90 days or Greater Past Due and Accruing		254
Real estate - commercial | Non-owner occupied special purpose | 90 Days or Greater Past Due
Aged analysis of past due loans
Total Past Due		248
Real estate - commercial | Retail properties
Aged analysis of past due loans
Current	42,577	49,538
Nonaccrual		1,081
Total Loans	42,577	50,619
Real estate - commercial | Farm
Aged analysis of past due loans
Current	15,823	15,270
Total Loans	15,823	15,270
Real estate - residential
Aged analysis of past due loans
Total Loans	438,610		373,477
Real estate - residential | Investor
Aged analysis of past due loans
Total Past Due	92
Current	56,163	55,248
Nonaccrual	361	372
Total Loans	56,616	55,620
Real estate - residential | Investor | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	92
Real estate - residential | Owner occupied
Aged analysis of past due loans
Total Past Due	327	74
Current	123,779	123,838
Nonaccrual	4,625	4,674
Total Loans	128,731	128,586
Real estate - residential | Owner occupied | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	258	74
Real estate - residential | Owner occupied | 60 to 89 Days Past Due
Aged analysis of past due loans
Total Past Due	69
Real estate - residential | Revolving and junior liens
Aged analysis of past due loans
Total Past Due	722	769
Current	125,998	110,291
Nonaccrual	1,119	1,192
Total Loans	127,839	112,252
Recorded Investment 90 days or Greater Past Due and Accruing	409
Real estate - residential | Revolving and junior liens | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	321	491
Real estate - residential | Revolving and junior liens | 60 to 89 Days Past Due
Aged analysis of past due loans
Total Past Due		278
Real estate - residential | Revolving and junior liens | 90 Days or Greater Past Due
Aged analysis of past due loans
Total Past Due	401
Consumer
Aged analysis of past due loans
Total Past Due	1
Current	2,102	2,767
Nonaccrual	17	7
Total Loans	2,120	2,774	2,913
Consumer | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	1
All other
Aged analysis of past due loans
Total Past Due		37
Current	8,703	11,252
Total Loans	8,703	11,289	12,695
All other | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due		37
Construction Loans | Real estate - commercial
Aged analysis of past due loans
Total Loans	91,479		$ 87,049
Construction Loans | Real estate - commercial | Homebuilder
Aged analysis of past due loans
Total Past Due		129
Current	2,503	2,221
Total Loans	2,503	2,350
Construction Loans | Real estate - commercial | Homebuilder | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due		129
Construction Loans | Real estate - commercial | Land
Aged analysis of past due loans
Total Past Due		1,124
Current	2,479	1,319
Total Loans	2,479	2,443
Construction Loans | Real estate - commercial | Land | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due		1,124
Construction Loans | Real estate - commercial | Commercial speculative
Aged analysis of past due loans
Current	35,432	32,028
Total Loans	35,432	32,028
Construction Loans | Real estate - commercial | All other
Aged analysis of past due loans
Total Past Due	190
Current	50,678	48,140
Nonaccrual	197	201
Total Loans	51,065	$ 48,341
Construction Loans | Real estate - commercial | All other | 30 to 59 Days Past Due
Aged analysis of past due loans
Total Past Due	$ 190

X

- Definition

Recorded investment in financing receivables that are 90 days or more past due and still accruing.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (d)
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+ References

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-Publisher FASB
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-SubTopic 10
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