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Loans - Impaired Loans - Average Recorded Investment and Interest Income Recognized (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2018
Average Recorded Investment
With no related allowance recorded	$ 20,798	$ 10,898
With an allowance recorded	645	7,071
Total impaired loans	21,443	17,969
Interest Income Recognized
With no related allowance recorded	101	22
With an allowance recorded		119
Total impaired loans	101	141
Commercial
Average Recorded Investment
With no related allowance recorded	128
Lease financing receivables
Average Recorded Investment
With no related allowance recorded	293	89
Real estate - commercial | Owner occupied general purpose
Average Recorded Investment
With no related allowance recorded	1,170	683
Interest Income Recognized
With no related allowance recorded		3
Real estate - commercial | Owner occupied special purpose
Average Recorded Investment
With no related allowance recorded	376	384
Real estate - commercial | Non-owner occupied general purpose
Average Recorded Investment
With no related allowance recorded	1,443	601
With an allowance recorded	123
Interest Income Recognized
With no related allowance recorded	1
Real estate - commercial | Non-owner occupied special purpose
Average Recorded Investment
With no related allowance recorded	507
With an allowance recorded		1,550
Real estate - commercial | Retail properties
Average Recorded Investment
With no related allowance recorded	1,161	541
Real estate - residential | Investor
Average Recorded Investment
With no related allowance recorded	1,708	371
With an allowance recorded		822
Interest Income Recognized
With no related allowance recorded	20
With an allowance recorded		22
Real estate - residential | Multifamily
Average Recorded Investment
With no related allowance recorded	2,412	2,362
Real estate - residential | Owner occupied
Average Recorded Investment
With no related allowance recorded	9,016	4,726
With an allowance recorded	402	3,544
Interest Income Recognized
With no related allowance recorded	65	18
With an allowance recorded		73
Real estate - residential | Revolving and junior liens
Average Recorded Investment
With no related allowance recorded	2,227	933
With an allowance recorded		1,153
Interest Income Recognized
With no related allowance recorded	15	1
With an allowance recorded		24
Consumer
Average Recorded Investment
With no related allowance recorded	105	11
With an allowance recorded		2
Construction Loans | Real estate - commercial | Commercial speculative
Average Recorded Investment
With no related allowance recorded	72
Construction Loans | Real estate - commercial | All other
Average Recorded Investment
With no related allowance recorded	$ 180	$ 197

X

- Definition

Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5258-111524

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Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
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+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
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-Section 50
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-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5258-111524

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
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-Section 50
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-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524

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