Derivatives and Financial Instruments - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended			1 Months Ended	12 Months Ended		1 Months Ended		12 Months Ended
	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Apr. 30, 2011 Interest Rate Swap	Dec. 31, 2013 Interest Rate Swap	Dec. 31, 2012 Interest Rate Swap	Aug. 31, 2007 August 2007 Interest Rate Swap Agreement	Sep. 30, 2005 September 2005 Interest Rate Swap Agreement	Dec. 31, 2013 September 2005 Interest Rate Swap Agreement	Dec. 31, 2012 September 2005 Interest Rate Swap Agreement
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Outstanding interest rate swap arrangements	$ 0	$ 0	$ 0
Notional amount of interest rate swap agreement					400,000,000				100,000,000
Effective date of the fixed rate swap									Apr. 25, 2006
Fixed interest rate paid									4.68%
Swap agreement expiration								2012-05	2013-07
Effective fixed rate paid on debt									5.28%
Interest rate spread over LIBOR									0.60%
Loss on early extinguishment of debt	75,400,000	0	75,400,000	0						3,300,000
Location of the swap on the consolidated balance sheets		Derivative gains and losses included in AOCI								Other non-current liabilities	Other non-current liabilities
Incremental expense resulting from interest rate swaps		5,300,000	9,300,000
Average swap interest rate					3.65%
Cost of expiration (termination)					11,000,000
Derivative instrument contractual life					10 years
Unrealized net loss						8,100,000	9,200,000
Outstanding foreign currency derivative contract	$ 163,700,000	$ 143,000,000	$ 163,700,000