Loans and Allowance for Credit Losses (Details 6) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Current	$ 700,489	$ 688,156
30-59 days past due	3,861	5,654
60-89 days past due	4,305	3,383
90 days or more past due	36	87
Total past due	8,202	9,124
Non-accrual	12,914	13,466
Total loans	721,605	710,746
Percent of total loans, Current	97.10%	96.80%
Percent of total loans, 30-59 days past due	0.50%	0.80%
Percent of total loans, 60-89 days past due	0.60%	0.50%
Percent of total loans, 90 days or more past due	0.00%	0.00%
Percent of total loans, Total past due	1.10%	1.30%
Percent of total loans, Non accrual	1.80%	1.90%
Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Current	68,844	61,325
30-59 days past due	268	1,786
60-89 days past due	0	0
90 days or more past due	0	0
Total past due	268	1,786
Non-accrual	8,585	6,046
Total loans	77,697	69,157
Residential real estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Current	257,818	263,165
30-59 days past due	1,933	3,351
60-89 days past due	3,012	2,702
90 days or more past due	9	83
Total past due	4,954	6,136
Non-accrual	1,652	4,035
Total loans	264,424	273,336
Commercial real estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Current	311,204	301,695
30-59 days past due	1,555	459
60-89 days past due	1,130	513
90 days or more past due	0	0
Total past due	2,685	972
Non-accrual	2,500	3,121
Total loans	316,389	305,788
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Current	54,798	52,352
30-59 days past due	70	47
60-89 days past due	157	131
90 days or more past due	0	0
Total past due	227	178
Non-accrual	54	141
Total loans	55,079	52,671
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Current	7,825	9,619
30-59 days past due	35	11
60-89 days past due	6	37
90 days or more past due	27	4
Total past due	68	52
Non-accrual	123	123
Total loans	$ 8,016	$ 9,794

Financing receivables percentage that are less than 60 days past due but more than 29 days past due.

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Financing receivables percentage that are less than 90 days past due but more than 59 days past due.

+ References

No definition available.

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Financing receivables percentage that are current.

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Financing receivables percentage that are equal to or greater than 90 days past due.

+ References

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- Definition

Recorded investment in financing receivables percentage that are on nonaccrual status as of the balance sheet date.

+ References

No definition available.

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Recorded Investment in financing receivables percentage that are past due at the balance sheet date.

+ References

No definition available.

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- Definition

Financing receivables that are less than 60 days past due but more than 29 days past due.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 7A

-URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953401-111524

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Financing receivables that are less than 90 days past due but more than 59 days past due.

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Financing receivables that are current.

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Financing receivables that are equal to or greater than 90 days past due.

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- Definition

Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date.

+ 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)

-URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5111-111524

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Recorded Investment in financing receivables that are past due at the balance sheet date.

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- Definition

Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522

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