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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Deferred tax assets:    
Accrued liabilities and reserves $ 113,085 $ 114,950
Tax loss and credit carryforwards 594,821 652,690
Disallowed interest carryforward 140,974 57,043
Postretirement benefits 9,273 10,221
Deferred revenue 140,604 104,791
Other 92,613 113,586
Total deferred tax assets 1,091,370 1,053,281
Valuation allowance (60,157) (68,013)
Deferred tax assets, net of valuation allowance 1,031,213 985,268
Deferred tax liabilities:    
Subscriber system assets (729,548) (684,110)
Intangible assets (1,139,927) (1,271,722)
Other (27,442) (18,610)
Total deferred tax liabilities (1,896,917) (1,974,442)
Net deferred tax liabilities $ (865,704) $ (989,174)