Goodwill and Other Intangible Assets, Net - Additional Information (Detail)			12 Months Ended
	Nov. 01, 2016 USD ($) Reporting_Unit	Nov. 01, 2015 USD ($)	Dec. 31, 2016 USD ($) Reporting_Unit	Dec. 31, 2015 USD ($) Reporting_Unit	Dec. 31, 2014 USD ($)
Finite-Lived Intangible Assets [Line Items]
Number of reporting units | Reporting_Unit	5		5	5
Goodwill, Impairment Loss	$ 0	$ 0
Intangible assets amortization period			7 years 7 months 6 days
2017			$ 17,400,000
2018			16,300,000
2019			12,100,000
2020			10,900,000
2021			$ 9,700,000
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization period			2 years
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization period			15 years
Client Lists [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets			$ 16,700,000	$ 14,700,000	$ 14,500,000
Intangible assets amortization period			7 years 6 months
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization period			8 years 10 months 24 days
Other Intangible Assets [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization period			2 years
Other Intangible Assets [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization period			15 years