Supplemental Balance Sheet, Income Statement and Cash Flow Information (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Accrued liabilities
Accrued compensation	$ 158,095	$ 173,732
Deferred revenue	148,165	172,578
Other taxes payable	58,590	44,652
Workers' compensation liabilities	22,645	22,645
Interest payable	90,878	99,869
Due to joint venture partners		6,041
Warranty accrual	6,436	5,237
Litigation reserves	26,782	23,687
Provision for termination payment		100,000
Current liability to discontinued operations	68,961	54,287
Professional fees	2,989	6,413
Current deferred tax liability	10,721	269
Other accrued liabilities	5,118	7,363
Accrued liabilities	$ 599,380	$ 716,773