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Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Deferred income tax liabilities:      
Property and equipment $ (278,303) $ (236,256)  
Goodwill (93,632) (85,467)  
Leased assets (76,728) (77,344)  
Customer holdbacks (32,661) (30,457)  
Other intangible assets 0 (4,438)  
Total deferred income tax liabilities (481,324) (433,962)  
Deferred income tax assets:      
Net operating loss carryforwards 78,947 82,817  
Lease liabilities 76,608 76,826  
Accruals and reserves 65,852 70,335  
Tax credits 39,826 42,202  
Other intangible assets 19,110 0  
Stock and incentive compensation 50,772 36,590  
Deferred tax benefits on unrecognized tax positions 10,090 10,108  
Other 7,535 9,617  
Subtotal 348,740 328,495  
Valuation allowance (41,308) (43,255) $ (104,200)
Total deferred income tax assets 307,432 285,240  
Total net deferred income tax liabilities $ (173,892) $ (148,722)