Income Taxes Unrecognized tax benefits (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Jan. 02, 2011
Income Tax Contingency [Line Items]
Other	$ 4,014	$ 4,413	$ 6,642
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized Tax Benefits	34,786	37,586		91,349
Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions	0	0
Unrecognized Tax Benefits, Decreases Resulting from Prior Period Tax Positions	0	0
Unrecognized Tax Benefits, Reductions Resulting from Lapse of Applicable Statute of Limitations	(2,800)	(17,362)
Unrecognized Tax Benefits, Decreases Resulting from Settlements with Taxing Authorities	0	(36,401)
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	2,071	3,891
Unrecognized Tax Benefits, Interest on Income Taxes Expense	(543)	(3,096)
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	2,265
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	4,831	5,373
Internal Revenue Service (IRS) [Member]
Income Tax Contingency [Line Items]
Other	983
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized Tax Benefits, Decreases Resulting from Settlements with Taxing Authorities	980
CANADA
Income Tax Contingency [Line Items]
Other	1,786
State and Local Jurisdiction [Member]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized Tax Benefits, Decreases Resulting from Settlements with Taxing Authorities	$ 2,800