Annual report pursuant to Section 13 and 15(d)

Income Taxes (Details 2)

v2.4.1.9
Income Taxes (Details 2) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Summary of gross unrecognized income tax benefits      
Unrecognized tax benefits at beginning of period $ 9,231us-gaap_UnrecognizedTaxBenefits $ 9,245us-gaap_UnrecognizedTaxBenefits $ 5,250us-gaap_UnrecognizedTaxBenefits
Gross increases - tax positions in prior period 717us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions 575us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions 4,467us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions
Gross decreases - tax positions in prior period (396)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions (589)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions (472)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions
Lapse of Statute of Limitations (472)us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations      
Settlements (3,190)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities      
Unrecognized tax benefits at end of period $ 5,890us-gaap_UnrecognizedTaxBenefits $ 9,231us-gaap_UnrecognizedTaxBenefits $ 9,245us-gaap_UnrecognizedTaxBenefits