Income Taxes (Details) - USD ($) None in scaling factor is -9223372036854775296	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Income Tax Contingency [Line Items]
Income tax provision
Change in unrecognized tax benefits during the period
Accrual for uncertain tax positions
Minimum [Member]
Income Tax Contingency [Line Items]
Tax years open for examination	2011
Maximum [Member]
Income Tax Contingency [Line Items]
Tax years open for examination	2014