Basis of Presentation - Summary of Purchased Identifiable Intangible Assets (Detail) (CPO Commerce, Inc [Member], USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014
Acquired Finite-Lived Intangible Assets [Line Items]
Finite lived intangible assets	$ 12,800
Customer relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite lived intangible assets	5,200
Finite lived intangible assets estimated life	3 years
Trademarks [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite lived intangible assets	$ 7,600
Finite lived intangible assets estimated life	15 years