Summary of Significant Accounting Policies - Goodwill (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Oct. 31, 2013 Rate	Dec. 31, 2013	Dec. 31, 2012
Accounting Policies [Abstract]
Goodwill	$ 33,798us-gaap_Goodwill		$ 33,798us-gaap_Goodwill	$ 33,798us-gaap_Goodwill
Revenue growth rate implied in reporting units valuations, number of years projected	5 years
Fair Value Inputs, Discount Rate		16.50%us-gaap_FairValueInputsDiscountRate
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount		37.00%

Fair Value Measurement, Assumptions Used to Calculate Reporting Unit Fair Value, Revenue Growth Rate, Period Evaluated

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- Details

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- Definition

Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (bbb)

-URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258

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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

+ Details

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- Definition

Percentage of fair value of reporting unit in excess of carrying amount.

+ References

No definition available.

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