Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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

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Name:	us-gaap_GoodwillImpairmentLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Goodwill (Details) (USD $)	3 Months Ended	0 Months Ended
Goodwill (Details) (USD $)	Mar. 31, 2015	Mar. 16, 2015	Dec. 31, 2014
Goodwill
Goodwill	$ 440,008,000us-gaap_Goodwill		$ 398,164,000us-gaap_Goodwill
Impairment of goodwill	0us-gaap_GoodwillImpairmentLoss
3Q Digital Inc
Goodwill
Goodwill		$ 41,844,000
Period for achievement of revenue performance goals		3 years