Debt - 2013 Senior Unsecured Notes - Additional Information (Detail) (2013 Senior Unsecured Notes [Member]) In Millions, unless otherwise specified	0 Months Ended
	Oct. 10, 2013 USD ($)	Oct. 10, 2013 EUR (€)	Dec. 31, 2013
Debt Instrument [Line Items]
Unsecured senior notes, value of offering	$ 274.9	€ 200.0
Unsecured senior notes, interest rate	5.75%	5.75%	5.75%
Debt instrument, maturity date	Oct. 01, 2020	Oct. 01, 2020
Senior notes frequency of periodic payment	Semi-annually	Semi-annually
Senior notes, earliest redemption date	Oct. 01, 2016	Oct. 01, 2016
Senior notes, repurchase price percentage on principal amount plus accrued and unpaid interest	101.00%	101.00%