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Composition of Certain Financial Statement Captions - Narrative (Details) (USD $)
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3 Months Ended | 11 Months Ended | 12 Months Ended | |
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Dec. 31, 2014
security
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Dec. 31, 2013
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Dec. 31, 2014
security
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Jan. 31, 2013
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| Cash, Cash Equivalents and Investments | ||||
| Number of owned securities that were in an unrealized loss position | 151us-gaap_AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1 | 151us-gaap_AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1 | ||
| Unrealized losses deemed to be other-than-temporary | $ 0us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsAvailableforsaleSecurities | $ 0us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsAvailableforsaleSecurities | ||
| Property, Plant and Equipment [Line Items] | ||||
| Depreciation | 9,700,000us-gaap_Depreciation | 14,700,000us-gaap_Depreciation | 7,100,000us-gaap_Depreciation | |
| Capitalized cost related to internal use software and website development costs | 1,300,000us-gaap_CapitalizedComputerSoftwareNet | 700,000us-gaap_CapitalizedComputerSoftwareNet | 1,300,000us-gaap_CapitalizedComputerSoftwareNet | 0us-gaap_CapitalizedComputerSoftwareNet |
| Accumulated amortization | 35,177,000us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment | 21,520,000us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment | 35,177,000us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment | |
| Software developed for internal use | ||||
| Property, Plant and Equipment [Line Items] | ||||
| Expected useful lives | 3 years | |||
| Capitalized cost related to internal use software and website development costs |
2,800,000us-gaap_CapitalizedComputerSoftwareNet / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_SoftwareDevelopmentMember |
1,500,000us-gaap_CapitalizedComputerSoftwareNet / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_SoftwareDevelopmentMember |
2,800,000us-gaap_CapitalizedComputerSoftwareNet / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_SoftwareDevelopmentMember |
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| Accumulated amortization |
1,700,000us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_SoftwareDevelopmentMember |
700,000us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_SoftwareDevelopmentMember |
1,700,000us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_SoftwareDevelopmentMember |
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| Amortization expense |
$ 600,000us-gaap_AdjustmentForAmortization / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_SoftwareDevelopmentMember |
$ 1,100,000us-gaap_AdjustmentForAmortization / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_SoftwareDevelopmentMember |
$ 100,000us-gaap_AdjustmentForAmortization / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_SoftwareDevelopmentMember |
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The aggregate amount of recurring noncash expense charged against earnings in the period to allocate the cost of assets over their estimated remaining economic lives. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Number of investment positions in available-for-sale investments in a continuous unrealized loss position for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The carrying amount of capitalized computer software costs net of accumulated amortization as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The amount by which the fair value of an investment in debt and equity securities categorized as Available-for-sale is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. No definition available.
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| X | ||||||||||
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- Details
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