Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Ownership percentage of subsidiaries included in tax return (more than 80%)	80.00%
Tax loss carryforwards	$ 8,339us-gaap_OperatingLossCarryforwards	$ 10,010us-gaap_OperatingLossCarryforwards
Valuation allowance	4,933	6,014
Unrecognized tax benefits	1,744us-gaap_UnrecognizedTaxBenefits	3,122us-gaap_UnrecognizedTaxBenefits	6,269us-gaap_UnrecognizedTaxBenefits	6,597us-gaap_UnrecognizedTaxBenefits
Unrecognized tax benefits, penalties and interest expense	(529)	(877)
Unrecognized tax benefits, penalties and interest accrued	247	776
Reasonably possible amount recognized over next 12 months	$ 553

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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The amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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Percentage of subsidiary's or equity method investee's stock owned by parent immediately after all stock transactions.

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

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

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-Glossary Unrecognized Tax Benefit

-URI http://asc.fasb.org/extlink&oid=6527854

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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