Loans and Allowance for Credit Losses (Details 7) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Allowance for credit losses:
Beginning balance	$ 7,695	$ 10,725
Charge-offs	(651)	(1,748)
Recoveries	104	117
Net charge-offs	(547)	(1,631)
Provision	650	975
Ending balance	7,798	10,069
Construction [Member]
Allowance for credit losses:
Beginning balance	1,303	1,960
Charge-offs	(363)	(17)
Recoveries	3	10
Net charge-offs	(360)	(7)
Provision	941	44
Ending balance	1,884	1,997
Residential real estate [Member]
Allowance for credit losses:
Beginning balance	2,834	3,854
Charge-offs	(114)	(672)
Recoveries	23	43
Net charge-offs	(91)	(629)
Provision	(619)	(1,139)
Ending balance	2,124	2,086
Commercial real estate [Member]
Allowance for credit losses:
Beginning balance	2,379	3,029
Charge-offs	(40)	(90)
Recoveries	13	6
Net charge-offs	(27)	(84)
Provision	(13)	1,639
Ending balance	2,339	4,584
Commercial [Member]
Allowance for credit losses:
Beginning balance	448	1,266
Charge-offs	(124)	(842)
Recoveries	47	50
Net charge-offs	(77)	(792)
Provision	70	203
Ending balance	441	677
Consumer [Member]
Allowance for credit losses:
Beginning balance	229	243
Charge-offs	(10)	(127)
Recoveries	18	8
Net charge-offs	8	(119)
Provision	(57)	184
Ending balance	180	308
Unallocated Financing Receivables [Member]
Allowance for credit losses:
Beginning balance	502	373
Charge-offs	0	0
Recoveries	0	0
Net charge-offs	0	0
Provision	328	44
Ending balance	$ 830	$ 417

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

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

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

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

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

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

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

+ References

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-Publisher FASB

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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

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