Supplemental Balance Sheet, Income Statement and Cash Flow Information (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Accrued liabilities
Accrued compensation	$ 140,376	$ 177,707
Deferred revenue	388,496	298,345
Other taxes payable	37,779	58,445
Workers' compensation liabilities	37,459	37,459
Interest payable	63,309	63,532
Warranty accrual	4,778	5,799
Litigation reserves	25,555	23,681
Current liability to discontinued operations	7,823	19,602
Professional fees	3,398	2,550
Current deferred tax liability	24,066	3,677
Current liability to acquisition of KVS	22,278	22,278
Merger transaction accrual	7,965
Other accrued liabilities	10,005	14,929
Accrued liabilities	$ 773,287	$ 728,004