Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred tax assets:
Net operating losses	$ 42,013	$ 46,615
Accrued expenses	17,715	14,708
Differences in income recognition related to receivable portfolios	13,857	20,612
Other	4,825	522
Difference in basis of bond and loan costs	3,728	7,878
Prepaid expenses	2,949	0
Stock-based compensation expense	2,796	4,777
State taxes	174	0
Total deferred tax assets	88,057	95,112
Valuation allowance	(46,516)	(34,642)
Total deferred tax assets net of valuation allowance	41,541	60,470
Deferred tax liabilities:
Deferred court costs	(23,484)	(20,207)
Other	(3,403)	(9,144)
Difference in basis of amortizable assets	(1,937)	(20,632)
State taxes	0	(1,237)
Total deferred tax liabilities	(28,824)	(51,220)
Net deferred tax asset	$ 12,717	$ 9,250