Long-Term Debt - Additional Information (Detail) (USD $)	12 Months Ended						12 Months Ended			12 Months Ended	1 Months Ended		1 Months Ended											12 Months Ended		12 Months Ended			12 Months Ended		12 Months Ended					12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2011 Senior Secured Credit Facility	Jul. 06, 2011 Senior Secured Credit Facility	Jun. 27, 2011 Senior Secured Credit Facility	Dec. 31, 2011 Senior Secured Credit Facility Minimum	Dec. 31, 2011 Senior Secured Credit Facility Required Ratio Maximum Point	Dec. 31, 2011 Senior Secured Credit Facility Required Ratio Minimum Point	Dec. 31, 2011 Prior Senior Secured Credit Facility	Jun. 27, 2011 Senior Secured Term Loan A Senior Secured Credit Facility	Dec. 31, 2011 Senior Secured Term Loan A Senior Secured Credit Facility	Jun. 27, 2011 Senior Secured Term Loan A Senior Secured Credit Facility During Each of the first two years	Jun. 27, 2011 Senior Secured Term Loan A Senior Secured Credit Facility During the third year	Jun. 27, 2011 Senior Secured Term Loan A Senior Secured Credit Facility During the fourth year	Jun. 27, 2011 Senior Secured Term Loan A Senior Secured Credit Facility During the fifth year	Jun. 27, 2011 Senior Secured Term Loan A Senior Secured Credit Facility Due at maturity	Jun. 27, 2011 Senior Secured Term Loan A Senior Secured Credit Facility Foreign Denominated	Jun. 27, 2011 Senior Secured Term Loan A Senior Secured Credit Facility Letter of Credit	Jun. 27, 2011 Senior Secured Term Loan A Senior Secured Credit Facility Revolving Line of Credit	Dec. 31, 2011 Senior Secured Revolving Credit Facility Senior Secured Credit Facility	Dec. 31, 2011 Base Rate Senior Secured Credit Facility	Dec. 31, 2011 Eurodollar Rate Senior Secured Credit Facility	Dec. 31, 2009 Prior Senior Secured Revolving Credit Facility	Jan. 22, 2009 Prior Senior Secured Revolving Credit Facility Maximum	Dec. 31, 2011 8 1/4% Senior Notes due 2015	Dec. 31, 2010 8 1/4% Senior Notes due 2015	Jun. 30, 2010 8 1/4% Senior Notes due 2015	Dec. 31, 2011 6 5/8% Senior Notes due 2021	Dec. 31, 2010 6 5/8% Senior Notes due 2021	Dec. 31, 2011 6 5/8% Senior Notes due 2021 Minimum	Jul. 31, 2011 6 5/8% Senior Notes due 2021 Exchange Offer	Dec. 31, 2011 6 5/8% Senior Notes due 2021 Senior Notes Redeemable Prior To February 1st, 2016	Dec. 31, 2011 6 5/8% Senior Notes due 2021 Senior Notes Redeemable Prior To February 1st, 2014 With Equity Offering Proceeds	Dec. 31, 2011 Senior Secured Convertible Notes due 2033, net of discount	Dec. 31, 2011 Senior Secured Convertible Notes due 2033, net of discount Minimum
Debt Outstanding [Line Items]
Maturities of long-term debt in year one	$ 15,000,000
Maturities of long-term debt in year two	22,500,000
Maturities of long-term debt in year three	37,500,000
Maturities of long-term debt in year four	45,000,000
Maturities of long-term debt in year five	222,500,000
Maturities of long-term debt thereafter	260,100,000
Cash used to repay outstanding debt										120,000,000
Debt, maturity period											5 years
Debt, face value											300,000,000													133,500,000								260,000,000
Debt, repayment of principal terms											A five-year term loan A in an aggregate principal amount equal to $300.0 million, with principal repayable in quarterly installments at a rate of 5.0% during each of the first two years from issuance, 10% during the third year from issuance, 15% during the fourth year from issuance and 11.25% during the fifth year from issuance, with the remaining 53.75% due at maturity (the "Term Loan A")
Percentage of the original note exchanged																																100.00%
Repayments of long-term debt	713,667,000	304,845,000	200,134,000							462,200,000														123,500,000			297,800,000
(Loss) gain on extinguishment of debt	(16,318,000)	(23,873,000)	10,028,000							(3,000,000)														10,000,000		(13,300,000)	(23,900,000)
Pre-tax loss on termination of hedge on related interest rate swap										2,600,000
Capitalized debt issuance costs	11,695,000		1,335,000							6,600,000																			5,100,000
Principal repayment, percentage													5.00%	10.00%	15.00%	11.25%	53.75%
Line of credit, maturity period											5 years
Line of credit, aggregate principal amount											100,000,000							15,000,000	50,000,000	20,000,000
Line of credit, outstanding amount												50,000,000
Line of credit, incremental facility						150,000,000
Line of credit available																					40,100,000
Standby letters of credit outstanding				9,900,000
Percentage of capital stock of foreign subsidiaries pledged as a guarantee				65.00%
Credit facility, interest rate description				Borrowings under our Senior Secured Credit Facility bear interest, at our option, at either the alternate base rate (defined as the higher of the prime rate announced by the Administrative Agent, the federal funds effective rate plus 0.5% or one-month LIBOR plus 1%) (the “Base Rate”) or at the Eurodollar Rate (one-, two-, three- or six-month LIBOR, at our election, as defined in the credit agreement governing the Senior Secured Credit Facility), except for borrowings made in alternate currencies which may not accrue interest based upon the alternate base rate, in each case, plus an applicable interest rate margin. The applicable margins are initially 0.75% per annum for Base Rate loans and 1.75% per annum for Eurodollar Rate loans. The margins applicable to the borrowings under our Senior Secured Credit Facility may be adjusted based on our consolidated leverage ratio, with 1.00% being the maximum Base Rate margin and 2.00% being the maximum Eurodollar Rate.
Debt instrument interest additional interest above federal funds effective rate				0.50%
Debt instrument interest additional interest above one-month LIBOR				1.00%
Debt, prepayment terms				The Senior Secured Credit Facility also contains a requirement that we make mandatory principal prepayments on the Term Loan A and Revolving Line of Credit in certain circumstances, including, without limitation, with 100% of the aggregate net cash proceeds from certain asset sales, casualty events or condemnation recoveries (in each case, to the extent not otherwise used for reinvestment in our business or related business and subject to certain other exceptions). The Senior Secured Credit Facility further provides that, subject to customary notice and minimum amount conditions, we may make voluntary prepayments without payment of premium or penalty.
Mandatory principal prepayments from aggregate net cash proceeds from certain asset sales, casualty events or condemnation recoveries, percentage				100.00%
Debt covenants				Our Senior Secured Credit Facility also requires us to comply with a maximum consolidated leverage ratio, as defined in our Senior Secured Credit Facility (generally, the ratio of our consolidated total debt to consolidated earnings before interest, taxes, depreciation and amortization, or EBITDA, for the most recent four quarters), of 3.50:1.00; and a minimum consolidated interest coverage ratio, as defined in our Senior Secured Credit Facility (generally, the ratio of our consolidated EBITDA to consolidated interest expense for the most recent four quarters), of 3.00:1.00.
Debt instrument, cross default provision				The indenture governing the 2033 Secured Notes contains a cross-default provision which becomes applicable if we default under any mortgage, indenture or instrument evidencing indebtedness for money borrowed by us and the default results in the acceleration of such indebtedness prior to its express maturity, and the principal amount of any such accelerated indebtedness aggregates in excess of $25.0 million. The 2021 Indenture contains a cross-default provision which becomes applicable if we (a) fail to pay the stated principal amount of any of our indebtedness at its final maturity date, or (b) default under any of our indebtedness and the default results in the acceleration of indebtedness, and, in each case, the principal amount of any such indebtedness, together with the principal amount of any other such indebtedness under which there has been a payment default or the maturity of which has been so accelerated, aggregates $50.0 million or more. Our credit agreement contains a cross-default provision which becomes applicable if we (a) fail to make any payment under any indebtedness for money borrowed by us (other than the obligations under such credit agreement) in an aggregate outstanding principal amount of at least $50.0 million or, (b) otherwise default under any such indebtedness, or trigger another event which causes such indebtedness to become due or to be repurchased, prepaid, defeased or redeemed or become subject to an offer to repurchase, prepay, defease or redeem such indebtedness prior to its stated maturity.
Senior secured debt, applicable margin rate					1.75%																	0.75%	1.75%
Senior secured debt, maximum applicable margin rate																						1.00%	2.00%
Consolidated leverage ratio								3.50
Consolidated interest coverage ratio									3.00
Authorized amount as result of the amendment																									125,000,000			297,800,000
Borrowings of long-term debt	610,000,000		20,000,000																										260,000,000
Interest rate, Percentage																										8.25%	8.25%		6.625%	6.625%
Debt Instrument, issuance date																													2011-01-28
Debt instrument redemption, description																													We may redeem all or a portion of the 2021 Notes at our option at any time prior to February 1, 2016, at a redemption price equal to 100% of the principal amount of 2021 Notes to be redeemed, plus a make-whole premium as described in the 2021 Indenture, plus accrued and unpaid interest to the redemption date, if any.
Debt Instrument Redemption Price																																	100.00%
Debt instrument redemption price																																		35.00%
Debt Instrument cash redemption price																													101.00%
Debt outstanding, before discount																																			85,000
Debt outstanding, net of discount																																			60,000
Cross-default provision, aggregate accelerated indebtedness							$ 50,000,000																								$ 50,000,000					$ 25,000,000