Income Taxes - Narrative (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Federal statutory tax rate	21.00%	21.00%	35.00%
Tax on foreign earnings		$ 4,200,000	$ 103,500,000
Adjustment to net deferred tax assets and liabilities		1,500,000	6,800,000
Deferred tax assets, valuation allowance recorded		23,900,000
Net operating loss and other carryforwards expiring between 2020 and 2029	$ 123,900,000
Deferred tax liabilities related to foreign earnings	6,700,000	6,500,000
Cash payments for income taxes	73,100,000	37,200,000	46,100,000
Cash refunds for income taxes	12,200,000	52,400,000	43,300,000
Excess tax benefit in share base compensation		1,700,000
Unrecognized tax benefits	23,100,000	25,000,000	30,900,000	$ 41,900,000
Unrecognized tax benefits that would impact effective tax rate	12,800,000
Amount of unrecognized tax benefit that will decrease within 12 months	2,300,000
Total interest (benefit) expense related to remaining tax uncertainties	(300,000)	(1,100,000)	200,000
Penalty amounts recognized	0	0	0
Accrued interest related to income tax uncertainties	3,600,000	2,900,000
Accrued penalties related to income tax uncertainties	0	0
Domestic
Domestic and foreign net operating loss carryforwards	190,600,000	166,400,000
Foreign
Domestic and foreign net operating loss carryforwards	$ 64,400,000	$ 113,600,000
Capital Loss Carry Forward
Pre-tax capital loss			$ 51,600,000