Long-Term Debt and Other Borrowing Arrangements - Additional Information (Detail)	3 Months Ended		12 Months Ended			12 Months Ended			12 Months Ended			1 Months Ended		12 Months Ended
	Dec. 31, 2012 USD ($)	Sep. 30, 2012 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Dec. 31, 2012 EUR (€)	Dec. 31, 2012 $400.0 million senior secured credit facility [Member] USD ($)	Dec. 31, 2012 Senior Secured Term Loan Credit Facility [Member] USD ($)	Dec. 31, 2012 Senior Secured Term Loan Credit Facility [Member] CAD	Dec. 31, 2012 Minimum [Member] $400.0 million senior secured credit facility [Member]	Dec. 31, 2012 Maximum [Member] $400.0 million senior secured credit facility [Member]	Dec. 31, 2012 Senior Subordinated notes due 2019 [Member] USD ($)	Aug. 31, 2012 Senior Subordinated notes due 2022 [Member] USD ($)	Aug. 31, 2012 Senior Subordinated notes due 2022 [Member] Senior Subordinate Notes [Member] USD ($)	Dec. 31, 2012 Senior subordinated notes due 2017 [Member] USD ($)
Debt Instrument [Line Items]
Senior secured credit facility	$ 247,714,000		$ 247,714,000					250,000,000
Debt issuance costs paid			15,414,000	3,296,000			1,700,000					13,700,000
Interest on term loan								3.60%
Maximum amount of Senior Secured Credit Facility						400,000,000
Credit facility expiration date						Apr. 25, 2016
Line of credit facility interest rate description						Under the revolving credit agreement, we are permitted to borrow and re-pay funds in various currencies. Interest on outstanding borrowings is variable, based on either the three month LIBOR rate or the prime rate
Line of credit, interest rate, LIBOR term						3 months
Available Borrowing Capacity	187,600,000		187,600,000
Borrrowing outstanding under the revolving credit agreement	198,300,000		198,300,000		150,000,000
Letters of credit outstanding, Amount	14,100,000		14,100,000
Commitment fee percentage depending on leverage ratio									0.25%	0.50%
Senior subordinated notes	705,221,000		705,221,000	550,926,000							5,200,000		700,000,000
Interest rate of senior subordinated notes											9.25%	5.50%
Senior Subordinated Notes maturing 2019; description of priority											The notes rank equal in right of payment with any future senior subordinated debt, and are subordinated to all of our senior debt and the senior debt of our subsidiary guarantors, including our Senior Secured Facility	The notes rank equal in right of payment with our senior subordinated notes due 2019 and with any future subordinated debt, and they are subordinated to all of our senior debt and the senior debt of our subsidiary guarantors, including our Senior Secured Facility.
Senior Subordinated Notes maturing 2019; guarantees by subsidiaries											The notes are guaranteed on a senior subordinated basis by certain of our subsidiaries	The notes are guaranteed on a senior subordinated basis by certain of our subsidiaries.
Frequency of interest payments											Semiannually	Semiannually
Repurchased senior subordinated notes											194,800,000			350,000,000
Cash consideration of senior subordinated notes											226,700,000			363,100,000
Senior subordinated notes due date											2019			2017
Loss on extinguishment of debt	1,900,000	50,600,000	(52,450,000)								52,500,000
Aggregate principal amount outstanding of senior subordinated notes	705,200,000		705,200,000	550,900,000							5,200,000
Effective interest rate of senior subordinated notes											9.75%
Fair value of debt instrument	725,200,000		725,200,000	561,400,000
Senior subordinated notes carrying value	$ 705,200,000		$ 705,200,000	$ 550,900,000