Debt (Details Textual 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended		12 Months Ended
	Dec. 31, 2011 2008 Credit Agreements [Member] CreditCommitment	Aug. 26, 2008 2008 Credit Agreements [Member]	Dec. 31, 2011 2008 Canadian Credit Agreement [Member]	Dec. 31, 2011 2008 Credit Agreement Amendment No. 2 [Member]	Dec. 31, 2011 2008 Canadian Credit Agreement Amendment No. 2 [Member]	Dec. 31, 2011 CKJEA Notes and other [Member]	Dec. 31, 2011 Brazilian subsidiaries [Member]	Jan. 01, 2011 Brazilian subsidiaries [Member]
Line of Credit Facility [Line Items]
2008 Credit Agreement Interest rate option	(i) 3.75%, based on a Base Rate plus 0.50% (ii) 2.08%, based on LIBOR plus 1.50%, in each case, on a per annum basis		(i) 3.50%, based on the prime rate announced by Bank of America (acting through its Canada branch) plus 0.50% or (ii) 2.66%, based on the BA Rate plus 1.50%, in each case, on a per annum basis			Euro LIBOR plus 1.0%
Interest rate based on base rate	3.75%
Interest Rate in Excess of Base Rate	0.50%
Interest Rate Based on LIBOR Rate	2.08%
Interest rate in excess of LIBOR rate	1.50%
Interest rate based on prime rate			3.50%
Interest rate in excess of prime rate			0.50%
Interest rate based on BA rate			2.66%
Interest Rate in excess of BA Rate			1.50%
Interest rate on revolving notes payable in addition to Euro LIBOR						1.00%
Revolving credit loans	$ 0		$ 0
Letters of credit, amount outstanding	32,966		2,746				6,373	357
Available line of credit	161,320		17,525
Maturity date				November 8, 2016	November 8, 2016
Reductions in interest rate margins	0.25%			0.25%	0.25%
Amount initially available for credit agreement	270,000		30,000	250,000	25,000
Reductions in commitment fees				0.125%	0.125%
Minimum fixed charge coverage ratio	1.1		1.1	1.0	1.0
Number of requests for additional credit commitments	3
Maximum additional credit commitments in aggregate	200,000
Deferred financing costs		$ 4,200		$ 2,526
Maximum equity ownership in first-tier foreign subsidiaries to be considered in first priority lien	66.00%