Goodwill and Identifiable Intangible Assets - Remaining Weighted Average Useful Life of Definite Intangible Assets (Detail)	12 Months Ended
	Dec. 31, 2014
Finite Lived Intangible Assets [Line Items]
Finite lived identifiable intangible assets, remaining weighted average useful lives	8 years 10 months 24 days
Customer relationships [Member]
Finite Lived Intangible Assets [Line Items]
Finite lived identifiable intangible assets, remaining weighted average useful lives	9 years 9 months 18 days
Trademarks and trade names [Member]
Finite Lived Intangible Assets [Line Items]
Finite lived identifiable intangible assets, remaining weighted average useful lives	4 years 9 months 18 days
Technology
Finite Lived Intangible Assets [Line Items]
Finite lived identifiable intangible assets, remaining weighted average useful lives	4 years 1 month 6 days
Customer Contracts
Finite Lived Intangible Assets [Line Items]
Finite lived identifiable intangible assets, remaining weighted average useful lives	2 years 9 months 18 days