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Significant Components of Net Deferred Tax Liabilities (Detail) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Components of Net Deferred Tax Liabilities [Line Items] |  |  |
Share-based compensation |  | $ 24,413 | $ 21,517
Capitalized inventory costs and inventory reserves |  | 3,627 | 2,151
Allowance for doubtful accounts |  | 1,338 | 1,057
Self-insurance reserves |  | 209 | 206
Other |  | 2,212 | 2,486
Net operating loss carryforwards |  | 2,036 | 484
Total deferred tax assets, gross |  | 33,835 | 27,901
Valuation allowance |  | (655) | 0
Total deferred tax assets |  | 33,180 | 27,901
Deductible goodwill |  | (73,898) | (69,600)
Depreciation |  | (14,241) | (10,695)
Other |  | (7,188) | (8,516)
Total deferred tax liabilities |  | (95,327) | (88,811)
Net deferred tax liabilities | [1] | $ (62,147) | $ (60,910)
[1] | Net deferred tax liabilities have been included in the consolidated balance sheets in deferred income taxes and other liabilities.

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