v2.4.1.9

Summary of Significant Accounting Policies Summary of Capitalized Software (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accounting Policies [Abstract]
Amounts capitalized for internal-use computer software (including work-in-process)	$ 34,053us-gaap_CapitalizedComputerSoftwareAdditions	$ 18,360us-gaap_CapitalizedComputerSoftwareAdditions	$ 17,341us-gaap_CapitalizedComputerSoftwareAdditions
Amounts expensed for amortization of internal-use computer software	$ 18,661us-gaap_CapitalizedComputerSoftwareAmortization	$ 18,830us-gaap_CapitalizedComputerSoftwareAmortization	$ 20,694us-gaap_CapitalizedComputerSoftwareAmortization

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- Definition

Additions made to capitalized computer software costs during the period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275

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- Definition

For each income statement presented, the amount charged to expense for amortization of capitalized computer software costs.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 985

-SubTopic 20

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128487-111756



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 985

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-Section 50

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-URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756

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