Long-Term Debt - Additional Information (Detail) (USD $)	3 Months Ended	6 Months Ended			1 Months Ended			1 Months Ended	3 Months Ended
	Jun. 30, 2012	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2011	Mar. 23, 2012 5% Senior Notes	Mar. 23, 2012 5% Senior Notes Prior to April One Twenty Fifteen	Mar. 23, 2012 5% Senior Notes Prior to April One Twenty Sixteen	Apr. 09, 2012 7 1/4% Senior Notes	Jun. 30, 2012 7 1/4% Senior Notes	Mar. 23, 2012 7 1/4% Senior Notes	Jun. 30, 2012 Revolving loans Bank debt	Jun. 30, 2012 Revolving and term loans Bank debt Other foreign
Line of Credit Facility [Line Items]
Long-term debt, current	$ 236,640,000	$ 236,640,000	$ 87,776,000	$ 146,602,000							$ 160,000,000	$ 76,600,000
Aggregate principal amount of notes issued					500,000,000
Debt instrument, stated interest rate					5.00%			7.25%
Issue price as percentage of principal amount					100.00%
Description of the debt instrument interest payment					Interest on the 5% Notes is payable semi-annually in cash on April 1 and October 1 of each year, and the 5% Notes mature on April 1, 2020.
Debt instrument, maturity date					Apr. 01, 2020
Debt instrument, maturity year										2016
Debt instrument, redemption date						Apr. 01, 2015	Apr. 01, 2016
Debt Instrument, redemption percentage with equity offering proceeds, maximum						35.00%
Redemption price as percentage of principal amount						105.00%	100.00%	112.3715%
Redemption price as percentage of principal amount upon the occurrence of change of control					101.00%
Senior subordinated note principal amount redeemed								250,000,000
Redemption price paid								280,900,000
Pre-tax charge for loss on early extinguishment of debt	$ (38,704,000)	$ (38,704,000)							$ (38,700,000)