Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Taxes [Line Items]
U.S. federal statutory rate	34.00%	34.00%	34.00%
Unrecognized tax benefits	$ 0.1	$ 0.3		$ 0.3
Undistributed earnings of non-U.S. subsidiaries	25.0
Deferred tax valuation allowance released amount based on expected future taxable income			$ 5.1
U.S. Federal NOLs
Income Taxes [Line Items]
Net operating loss carry forwards	$ 916.0
Net operating loss expiration period	20 years
Net operating loss carry forwards expiration year	Dec. 31, 2027
Non-U.S. NOLs
Income Taxes [Line Items]
Net operating loss carry forwards	$ 30.4