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Income Taxes (Details) (USD $)	3 Months Ended		9 Months Ended
Income Taxes (Details) (USD $)	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Tax Examination [Line Items]
Accrued interest expense	$ 26,000	$ 8,000	$ 191,000	$ 159,000
Gross liability for unrecognized tax benefits	8,600,000		8,600,000
Unrecognized tax benefits that would impact our effective tax rate	5,500,000		5,500,000
Interest included in total liability	1,700,000		1,700,000
Significant increases or decreases for uncertain tax positions	$ 0		$ 0
State and Foreign Tax Authorities \| Minimum
Income Tax Examination [Line Items]
Period of statute of limitations (years)			3 years
State and Foreign Tax Authorities \| Maximum
Income Tax Examination [Line Items]
Period of statute of limitations (years)			4 years

This element represents the amount of interest expense accrued as of the date of the statement of financial position for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity.

+ References+ Details

- Definition

This element represents interest expense recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity.

+ References+ Details