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Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Deferred tax assets: |  |
Stock-based compensation expense | $ 4,777 | $ 7,549
Accrued expenses | 14,708 | 19,868
Differences in income recognition related to receivable portfolios | 20,612 | 45,419
Net operating losses | 46,615 | 26,386
Difference in basis of bond and loan costs | 7,878 | 3,007
Other | 522 | 6,067
Total deferred tax assets | 95,112 | 108,296
Valuation allowance | (34,642) | (18,892)
Net deferred tax assets | 60,470 | 89,404
Deferred tax liabilities: |  |
State taxes | (1,237) | (377)
Deferred court costs | (20,207) | (19,860)
Difference in basis of amortizable assets | (18,573) | (16,488)
Difference in basis of depreciable assets | (2,059) | (7,705)
Other | (9,144) | (1,555)
Deferred tax liabilities gross | (51,220) | (45,985)
Net deferred tax asset | $ 9,250 | $ 43,419

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