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Significant Components of Net Deferred Tax Liabilities (Detail) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Components of Net Deferred Tax Liabilities [Line Items]    
Share-based compensation $ 27,223 $ 24,413
Capitalized inventory costs and inventory reserves 3,189 3,627
Allowance for doubtful accounts 949 1,338
Self-insurance reserves 518 209
Other 5,090 2,212
Net operating loss carryforwards 2,930 2,036
Total deferred tax assets, gross 39,899 33,835
Valuation allowance (668) (655)
Total deferred tax assets 39,231 33,180
Deductible goodwill (78,288) (73,898)
Depreciation (16,441) (14,241)
Other (7,050) (7,188)
Total deferred tax liabilities (101,779) (95,327)
Net deferred tax liabilities [1] $ (62,548) $ (62,147)
[1] Net deferred tax liabilities have been included in the consolidated balance sheets in deferred income taxes and other liabilities.