Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Components Of Income Tax Expense Benefit [Line Items]
Net increase in valuation allowance	$ 5.9
Operating loss carry forwards, state, net of tax	11.9
Operating loss carry forwards, foreign, net of tax	154.5
Gross unrecognized tax benefit	15.8	$ 15.6
Accrued interest and penalties related to unrecognized tax benefits	0.8	0.5
Unremitted foreign earnings	439.2	$ 374.1
U.S. Subsidiary [Member]
Components Of Income Tax Expense Benefit [Line Items]
Unremitted foreign earnings	$ 448.8