Goodwill and Other Intangible Assets - Additional Information (Detail) (Weighted average)	6 Months Ended
	Jun. 30, 2014
Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period for definite-lived intangible assets	67 months
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period for definite-lived intangible assets	63 months
Technology intangible assets
Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period for definite-lived intangible assets	22 months
Media Content
Finite-Lived Intangible Assets [Line Items]
Weighted average amortization period for definite-lived intangible assets	119 months