Quarterly report pursuant to Section 13 or 15(d)

Property, Equipment and Software - Additional Information (Details)

v2.4.1.9
Property, Equipment and Software - Additional Information (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Property, Plant and Equipment [Line Items]      
Carrying amount of capitalized software development costs $ 34.5us-gaap_CapitalizedComputerSoftwareGross   $ 32.5us-gaap_CapitalizedComputerSoftwareGross
Accumulated depreciation of capitalized software development costs (11.4)us-gaap_CapitalizedComputerSoftwareAccumulatedAmortization   (10.7)us-gaap_CapitalizedComputerSoftwareAccumulatedAmortization
Depreciation and amortization expense for property, equipment and software 5.0us-gaap_DepreciationDepletionAndAmortization 4.2us-gaap_DepreciationDepletionAndAmortization  
Software      
Property, Plant and Equipment [Line Items]      
Depreciation and amortization expense for property, equipment and software 0.7us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ComputerSoftwareIntangibleAssetMember
0.3us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ComputerSoftwareIntangibleAssetMember
 
Impairment loss $ 0.6us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ComputerSoftwareIntangibleAssetMember