Income Taxes - Narrative (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Deferred tax assets, valuation allowance provision	$ 154,100,000	$ 130,800,000
Loss on foreign currency transaction and translation, pre-tax		30,300,000	$ 18,400,000
Net operating loss and other carryforwards expiring between 2017 and 2026	34,700,000
Deferred tax liabilities related to foreign earnings	6,700,000	4,300,000
Undistributed earnings of foreign subsidiaries	955,900,000
Cash payments for income taxes	108,200,000	129,100,000	119,800,000
Cash refunds for income taxes	7,200,000	14,800,000	13,700,000
Income tax benefit associated with dispositions of employee stock options	2,300,000	3,200,000	2,900,000
Unrecognized tax benefits	41,900,000	51,000,000	58,500,000	$ 33,800,000
Unrecognized tax benefits that would impact effective tax rate	26,100,000
Amount of unrecognized tax benefit that will decrease within 12 months	5,600,000
Total interest benefit related to remaining tax uncertainties	(500,000)	(100,000)
Total interest expense, net of tax benefits related to remaining tax uncertainties			100,000
Penalty amounts recognized	0	0	0
Accrued interest related to income tax uncertainties	4,000,000	4,700,000
Accrued penalties related to income tax uncertainties	0	0
Devaluation of Venezuelan Bolivar
Loss on foreign currency transaction and translation, pre-tax		30,300,000
International
Deferred tax assets, valuation allowance provision		11,300,000
Strategic Services
Income tax benefits from value decline			$ 15,200,000
State and Local Jurisdiction
Deferred tax assets, valuation allowance provision	9,500,000
Domestic
Domestic and foreign net operating loss carryforwards	63,300,000	68,200,000
Foreign
Domestic and foreign net operating loss carryforwards	$ 101,600,000	$ 88,400,000