Income Taxes (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Examination [Line Items]
Federal corporate tax rate	35.00%	35.00%	35.00%
Increase (decrease) in net liability for unrecognized tax benefits	$ (37,000)	$ (1,800,000)
Accrued interest expense	200,000	300,000
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
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