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Income Taxes - Deferred Tax Assets and Liabilities (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Deferred tax assets:    
Net operating losses and tax credit carryforwards – federal and state $ 25,118 $ 27,294
Bad debt allowance 996 898
Accrued compensation and severance 14,645 15,229
Pension reserves 724 595
Insurance reserves 16,485 13,994
Leases 3,436 5,374
Accrued expenses 1,496 4,231
Interest carryforwards 59,413 32,272
Lease liabilities 98,419  
Other assets 2,562 2,284
Total gross deferred tax assets 223,294 102,171
Less: valuation allowance (28,648) (24,079)
Deferred tax assets 194,646 78,092
Deferred tax liabilities:    
Fixed asset basis difference (43,992) (48,698)
Prepaid items (2,163) (1,728)
Intangible assets (104,542) (87,628)
Lease right-of-use assets (99,677)  
Other liabilities (12,793) (16,942)
Total deferred tax liabilities (263,167) (154,996)
Total net deferred tax liability $ (68,521) $ (76,904)