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Income Taxes - Significant Components of Federal and State Deferred Tax Assets And Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Deferred tax assets: |  |
Allowance for doubtful accounts | $ 3,109 | $ 2,672
Deferred compensation | 6,601 | 8,532
Accrued insurance claims | 3,665 | 5,862
Non-deductible reserves | 567 | 1,257
Amortization of intangibles | 162 | 624
Other | 662 | 858
Deferred tax assets | 14,766 | 19,805
Deferred tax liabilities: |  |
Expensing of housekeeping supplies | (4,678) | (6,752)
Depreciation of property and equipment | (1,745) | (2,568)
Other | (845) | (663)
Deferred tax liabilities | (7,268) | (9,983)
Net deferred tax assets | $ 7,498 | $ 9,822

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