Long-Term Debt - Additional Information (Detail) (USD $)	12 Months Ended					12 Months Ended										3 Months Ended	12 Months Ended											12 Months Ended								12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Jun. 27, 2011 Incremental Credit Facility	Jun. 27, 2011 Term Loan A	Dec. 31, 2012 Term Loan A Principal Repayment Percentage in Each of First Two Years from Issuance [Member]	Dec. 31, 2012 Term Loan A Principal Repayment Percentage in Third Year from Issuance [Member]	Dec. 31, 2012 Term Loan A Principal Repayment Percentage in Fourth Year from Issuance [Member]	Dec. 31, 2012 Term Loan A Principal Repayment Percentage in Fifth Year from Issuance [Member]	Dec. 31, 2012 Term Loan A Principal repayable at maturity	Dec. 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, 2010 Senior Notes due 2015 [Member]	Dec. 31, 2011 Senior Notes due 2015 [Member]	Dec. 31, 2010 Senior Notes due 2015 [Member]	Dec. 31, 2011 Prior Senior Secured Credit Facility	Dec. 31, 2012 Senior Secured Credit Facility	Dec. 31, 2011 Senior Secured Credit Facility	Jun. 27, 2011 Senior Secured Credit Facility	Dec. 31, 2012 Senior Secured Credit Facility Base Rate	Dec. 31, 2012 Senior Secured Credit Facility Euro Dollar Rate	Dec. 31, 2012 Senior Secured Revolving Credit Facility	Dec. 31, 2011 Senior Secured Revolving Credit Facility	Jan. 28, 2011 Senior Secured Revolving Credit Facility	Dec. 31, 2012 Senior Notes due 2021	Dec. 31, 2011 Senior Notes due 2021	Jul. 31, 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]	Dec. 31, 2012 Senior Secured Convertible Notes due 2033 Member	Dec. 31, 2011 Senior Secured Convertible Notes due 2033 Member	Dec. 31, 2012 Senior Notes due 2033	Dec. 31, 2011 Interest Rate Swap with Three Month LIBOR at 2.005% Plus Applicable Margin
Debt Outstanding [Line Items]
Principal Redeemable with Equity Offering Proceeds																															35.00%
Debt Instrument, Redemption Price																																100.00%	101.00%
Long-term Debt, Gross																																		$ 85,000
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											42,600,000	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	15,000,000	713,667,000	304,845,000													297,800,000		297,800,000	462,200,000
Standby letters of credit outstanding	7,400,000
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%
Gains (Losses) on Extinguishment of Debt	0	(16,318,000)	(23,873,000)														13,300,000		3,000,000
Amount of Pre-tax Loss Reclassified from AOCI into Earnings	(1,400,000)	(5,000,000)	(17,300,000)																																		2,600,000
Long-term Debt	587,561,000	602,560,000																							50,000,000	50,000,000			260,000,000	260,000,000				61,000	60,000
Capitalized debt issuance costs																					$ 6,600,000								$ 5,100,000