Income Taxes (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Income Tax Examination [Line Items]
Material changes to the total amount of unrecognized tax benefits	$ 0
Accrued interest expense	59,000	58,000
Gross liability for unrecognized tax benefits	8,800,000
Unrecognized tax benefits that would impact our effective tax rate	5,700,000
Interest included in total liability	1,700,000
Significant increases or decreases for uncertain tax positions	$ 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