Income Taxes - Uncertain Tax Positions (Details) (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Unrecognized tax benefits including interest and penalties	$ 3,600,000	$ 3,600,000
Interest and penalties	200,000	100,000	100,000
Schedule reconciliation of gross unrecognized tax benefits
Beginning balance	3,490,000us-gaap_UnrecognizedTaxBenefits	5,006,000us-gaap_UnrecognizedTaxBenefits	5,387,000us-gaap_UnrecognizedTaxBenefits
Additions as a result of tax provisions taken during the current year	213,000	357,000	261,000
Subtractions as a result of tax provisions taken during the prior year	(150,000)	(126,000)	(346,000)
Foreign currency translation	(8,000)	45,000	0
Lapse in statute of limitations	(59,000)	(63,000)	(296,000)
Settlements	0	(1,729,000)	0
Ending balance	3,486,000us-gaap_UnrecognizedTaxBenefits	3,490,000us-gaap_UnrecognizedTaxBenefits	5,006,000us-gaap_UnrecognizedTaxBenefits
Unrecognized tax benefits that would impact effective tax rate	3,200,000	3,200,000	4,700,000
Decrease in unrecognized tax benefits is reasonably possible in next 12 months	$ 500,000

Unrecognized Tax Benefits, Including Income Tax Interest and Penalties Accrued

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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.

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-Publisher FASB

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

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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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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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

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Amount of increase in unrecognized tax benefits resulting from foreign currency translation.

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

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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