Income Taxes (Details 4) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year	$ 1,110us-gaap_UnrecognizedTaxBenefits	$ 1,046us-gaap_UnrecognizedTaxBenefits	$ 635us-gaap_UnrecognizedTaxBenefits
Additions based on tax positions related to the current year	125	114	97
Additions based on tax positions related to prior years	384		415
Reductions based on tax positions related to prior years		(45)
Reductions as a result of a lapse in statute of limitations	(132)	(5)	(101)
Balance at ending of year	$ 1,487us-gaap_UnrecognizedTaxBenefits	$ 1,110us-gaap_UnrecognizedTaxBenefits	$ 1,046us-gaap_UnrecognizedTaxBenefits

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Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Unrecognized Tax Benefit

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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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-Name Accounting Standards Codification

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

+ References

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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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