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Prepaid Expenses (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Prepaid inventories	$ 4,468us-gaap_OtherPrepaidExpenseCurrent	$ 2,972us-gaap_OtherPrepaidExpenseCurrent
Prepaid insurance and other	3,808us-gaap_PrepaidInsurance	3,838us-gaap_PrepaidInsurance
Prepaid expenses	$ 8,276	$ 6,810

- Definition

Amount of asset related to consideration paid in advance for insurance that provides economic benefits within a future period of one year or the normal operating cycle, if longer.

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