Long-Term Debt and Other Borrowing Arrangements - Additional Information (Detail)	3 Months Ended	9 Months Ended		12 Months Ended	9 Months Ended		1 Months Ended	9 Months Ended		9 Months Ended		1 Months Ended
	Sep. 30, 2012 USD ($)	Sep. 30, 2012 USD ($)	Oct. 02, 2011 USD ($)	Dec. 31, 2011 USD ($)	Sep. 30, 2012 $400.0 million senior secured credit facility USD ($)	Jul. 23, 2012 $400.0 million senior secured credit facility	Jan. 31, 2012 Senior Subordinated notes due 2017 [Member] USD ($)	Sep. 30, 2012 Senior Secured Term Loan Credit Facility [Member] USD ($)	Jul. 23, 2012 Senior Secured Term Loan Credit Facility [Member] CAD	Sep. 30, 2012 Senior Subordinated notes due 2017 USD ($)	Sep. 30, 2012 Senior Subordinated notes due 2019 USD ($)	Aug. 31, 2012 Senior Subordinated Notes Due 2022 USD ($)	Aug. 31, 2012 Senior Subordinated Notes Due 2022 Senior Subordinate Notes [Member] USD ($)
Debt Instrument [Line Items]
Senior secured credit facility	$ 255,400,000	$ 255,400,000							250,000,000
Fees associated with debt issuance		15,116,000	3,296,000	3,300,000				1,700,000				13,400,000
Maximum amount of old 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	386,800,000	386,800,000
Repurchased senior subordinated notes							600,000
Issued senior subordinated notes													700,000,000
Interest rate of senior subordinated notes											9.25%	5.50%
Senior Subordinated Notes maturing 2017 and 2019; description of priority												The notes rank equal in right of payment with our senior subordinated notes due 2017 and 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 2017 and 2019; guarantees by subsidiaries												The notes are guaranteed on a senior subordinated basis by certain of our subsidiaries.
Frequency of interest payments												Semiannually
Repurchased senior subordinated notes										291,900,000	183,000,000
Cash consideration of senior subordinated notes										303,000,000	212,700,000
Senior subordinated notes due date										2017	2019
Loss on extinguishment of debt	50,585,000	50,585,000								2,700,000
Repurchased remaining senior subordinated notes										57,500,000
Subordinated notes redemption										59,500,000
Aggregate principal amount outstanding of senior subordinated notes											17,000,000
Senior subordinated notes carrying value	959,762,000	959,762,000		550,926,000							17,100,000
Effective interest rate of senior subordinated notes											9.75%
Fair value of debt instrument	740,400,000	740,400,000
Senior subordinated notes carrying value	$ 717,100,000	$ 717,100,000