Loans and Allowance for Credit Losses (Details 8) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2016	Mar. 31, 2015
Allowance for credit losses:
Beginning balance	$ 8,316	$ 7,695
Charge-offs	(570)	(651)
Recoveries	113	104
Net charge-offs	(457)	(547)
Provision	450	650
Ending balance	8,309	7,798
Construction [Member]
Allowance for credit losses:
Beginning balance	1,646	1,303
Charge-offs	(241)	(363)
Recoveries	6	3
Net charge-offs	(235)	(360)
Provision	342	941
Ending balance	1,753	1,884
Residential real estate [Member]
Allowance for credit losses:
Beginning balance	2,181	2,834
Charge-offs	(16)	(114)
Recoveries	34	23
Net charge-offs	18	(91)
Provision	(185)	(619)
Ending balance	2,014	2,124
Commercial real estate [Member]
Allowance for credit losses:
Beginning balance	2,999	2,379
Charge-offs	(238)	(40)
Recoveries	0	13
Net charge-offs	(238)	(27)
Provision	496	(13)
Ending balance	3,257	2,339
Commercial [Member]
Allowance for credit losses:
Beginning balance	558	448
Charge-offs	(67)	(124)
Recoveries	65	47
Net charge-offs	(2)	(77)
Provision	29	70
Ending balance	585	441
Consumer [Member]
Allowance for credit losses:
Beginning balance	156	229
Charge-offs	(8)	(10)
Recoveries	8	18
Net charge-offs	0	8
Provision	21	(57)
Ending balance	177	180
Unallocated Financing Receivables [Member]
Allowance for credit losses:
Beginning balance	776	502
Charge-offs	0	0
Recoveries	0	0
Net charge-offs	0	0
Provision	(253)	328
Ending balance	$ 523	$ 830

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

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- Definition

The increase (decrease) in the allowance for credit losses related to financing receivables.

+ References

+ Details

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- Definition

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

+ References

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- Definition

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

+ References

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- References

No definition available.

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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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