Long-Term Debt - Additional Information (Detail) (USD $)	3 Months Ended					3 Months Ended										3 Months Ended								3 Months Ended						3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011	Jun. 27, 2011 Incremental Credit Facility	Jun. 27, 2011 Term Loan A	Mar. 31, 2012 Term Loan A Principal repayable during the first year	Mar. 31, 2012 Term Loan A Principal repayable during the second year	Mar. 31, 2012 Term Loan A Principal repayable during the fourth year	Mar. 31, 2012 Term Loan A Principal repayable during the fifth year	Mar. 31, 2012 Term Loan A Principal repayable at maturity	Mar. 31, 2012 Senior Secured Revolving Credit Facility	Jun. 27, 2011 Senior Secured Revolving Credit Facility	Jun. 27, 2011 Senior Secured Revolving Credit Facility Foreign Denominated	Jun. 27, 2011 Senior Secured Revolving Credit Facility Letter of Credit	Jun. 27, 2011 Senior Secured Revolving Credit Facility Revolving Line of Credit	Jun. 30, 2011 Prior Senior Secured Credit Facility	Mar. 31, 2012 Senior Secured Credit Facility	Jun. 27, 2011 Senior Secured Credit Facility	Mar. 31, 2012 Senior Secured Credit Facility Base Rate	Mar. 31, 2012 Senior Secured Credit Facility Euro Dollar Rate	Mar. 31, 2012 Senior Secured Revolving Credit Facility	Dec. 31, 2011 Senior Secured Revolving Credit Facility	Jan. 28, 2011 Senior Secured Revolving Credit Facility	Mar. 31, 2012 Senior Notes due 2021	Dec. 31, 2011 Senior Notes due 2021	Jan. 28, 2011 Senior Notes due 2021	Jan. 28, 2011 Senior Notes due 2021 Senior Notes Redeemable Prior to February 1, 2014 [Member]	Jan. 28, 2011 Senior Notes due 2021 Senior Notes Redeemable Prior To February 1, 2016 Member	Jan. 28, 2011 Senior Notes due 2021 Senior Notes Redeemable Upon Change in Control [Member]	Mar. 31, 2012 Senior Notes due 2033
Debt Outstanding [Line Items]
Principal Redeemable with Equity Offering Proceeds																											35.00%
Debt Instrument, Redemption Price																												100.00%	101.00%
Cross-Default Accelerated Indebtedness Amount																	$ 50,000,000							$ 50,000,000						$ 25,000,000
Debt Instrument, Interest Rate, Stated Percentage																								6.625%	6.625%
Debt Instrument, Face Amount					300,000,000
Principal repayment, percentage						5.00%	10.00%	15.00%	11.25%	53.75%
Line of credit, aggregate principal amount												100,000,000	15,000,000	50,000,000	20,000,000
Line of credit, outstanding amount											40,100,000	50,000,000
Line of credit, incremental facility				150,000,000
Cash used to repay outstanding debt																120,000,000
Repayments of long-term debt	3,750,000	243,989,000														462,200,000
Standby letters of credit outstanding	9,900,000
Senior secured debt, applicable margin rate																			0.75%	1.75%
Senior secured debt, maximum applicable margin rate																			1.00%	2.00%
Percentage of capital stock of foreign subsidiaries pledged as a guarantee																		65.00%
Mandatory principal prepayments from aggregate net cash proceeds from certain asset sales, casualty events or condemnation recoveries, percentage																							100.00%
Pre-tax loss on extinguishment of debt	0	(13,352,000)
Long-term Debt	598,810,000		602,560,000																		50,000,000	50,000,000		260,000,000	260,000,000
Capitalized debt issuance costs																										$ 5,100,000