Income Taxes - Additional Information (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Net tax benefits related to stock option plans recorded as a reduction of income taxes payable and an increase in APIC	$ 0	$ 3
Income tax payments	1,100us-gaap_IncomeTaxesPaid	15us-gaap_IncomeTaxesPaid
Federal tax refunds received	$ 3,484us-gaap_ProceedsFromIncomeTaxRefunds	$ 0us-gaap_ProceedsFromIncomeTaxRefunds

Amount of increase in additional paid in capital (APIC) resulting from a tax benefit associated with share-based compensation plan other than an employee stock ownership plan (ESOP). Includes, but is not limited to, excess tax benefit.

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income.

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The amount of cash received during the period as refunds for the overpayment of taxes.

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