Loans and Allowance for Credit Losses - Allowance for Credit Losses (Details) $ in Thousands	3 Months Ended
Mar. 31, 2016 USD ($) quarter	Mar. 31, 2015 USD ($)	Dec. 31, 2015 USD ($)
Financing Receivable, Allowance for Credit Losses [Line Items]
Lookback period used in reserve analysis \| quarter	20
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, beginning balance	$ 9,610	$ 8,308
Provision charged to operations	(250)	0
Losses charged to allowance	(13)	(441)
Recoveries	789	532
Allowance for credit losses, ending balance	10,136	8,399
Ending balance: individually evaluated for impairment	795		$ 164
Ending balance: collectively evaluated for impairment	9,341		9,446
Commercial
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, beginning balance	3,562	3,130
Provision charged to operations	(152)	308
Losses charged to allowance	(4)	(410)
Recoveries	337	101
Allowance for credit losses, ending balance	3,743	3,129
Ending balance: individually evaluated for impairment	565		1
Ending balance: collectively evaluated for impairment	3,178		3,561
Real Estate Portfolio Segment
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, beginning balance	5,204	4,058
Provision charged to operations	(340)	391
Losses charged to allowance	0	0
Recoveries	417	8
Allowance for credit losses, ending balance	5,281	4,457
Ending balance: individually evaluated for impairment	124		128
Ending balance: collectively evaluated for impairment	5,157		5,076
Consumer
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, beginning balance	734	1,078
Provision charged to operations	134	(705)
Losses charged to allowance	(9)	(31)
Recoveries	35	423
Allowance for credit losses, ending balance	894	765
Ending balance: individually evaluated for impairment	106		35
Ending balance: collectively evaluated for impairment	788		699
Unallocated
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, beginning balance	110	42
Provision charged to operations	108	6
Losses charged to allowance	0	0
Recoveries	0	0
Allowance for credit losses, ending balance	218	$ 48
Ending balance: individually evaluated for impairment	0		0
Ending balance: collectively evaluated for impairment	$ 218		$ 110

Financing Receivable, Allowance for Credit Losses, Methodology Change, Number of Rolling Quarters Used in Analysis

No definition available.

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- Definition

A valuation allowance for financing receivables that are expected to be uncollectible.

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- Definition

The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

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- Definition

Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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- Definition

Amount of recovery of financing receivables doubtful of collection that were previously charged off.

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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- Definition

Amount of direct write-downs of financing receivables charged against the allowance.

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- Definition

Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.11)
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

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