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Goodwill and Identifiable Intangible Assets - Remaining Weighted Average Useful Life of Definite Lived Intangible Assets (Detail)	12 Months Ended
	Dec. 31, 2016
Finite Lived Intangible Assets [Line Items]
Finite lived identifiable intangible assets, remaining weighted average useful lives	7 years 4 months 24 days
Customer relationships [Member]
Finite Lived Intangible Assets [Line Items]
Finite lived identifiable intangible assets, remaining weighted average useful lives	8 years 2 months 12 days
Trademarks and tradenames [Member]
Finite Lived Intangible Assets [Line Items]
Finite lived identifiable intangible assets, remaining weighted average useful lives	5 years 1 month 6 days
Technology [Member]
Finite Lived Intangible Assets [Line Items]
Finite lived identifiable intangible assets, remaining weighted average useful lives	3 years 2 months 12 days
Customer Contracts [Member]
Finite Lived Intangible Assets [Line Items]
Finite lived identifiable intangible assets, remaining weighted average useful lives	7 years 2 months 12 days