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Income Taxes - Additional Information (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
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	$ 8	$ 634
Income tax payments	4,601	6,600
Federal tax refunds received	580	1,598
Interest costs related to the settlement of a tax audit			$ 137

Tax benefit associated with any equity-based compensation plan other than an employee stock ownership plan (ESOP). The tax benefit results from the deduction by the entity on its tax return for an award of stock that exceeds the cumulative compensation cost for common stock or preferred stock recognized for financial reporting. Includes any resulting tax benefit that exceeds the previously recognized deferred tax asset (excess tax benefits).

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- Definition

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

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