Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred tax assets:
Stock-based compensation expense	$ 1,301	$ 7,143
Accrued expenses	7,899	6,701
Differences in income recognition related to receivable portfolios	33,652	31,799
State and international operating losses	15,234	12,917
Difference in basis of depreciable assets	3,069	2,077
Capitalized legal fees—international	4,143	4,365
Cumulative translation adjustment	958	4,036
Tax benefit of uncertain tax positions	1,349	1,247
Difference in basis of bond and loan costs	9,480	10,455
Difference in basis of intangible assets	18,089	0
Other	2,372	376
Valuation allowance	(4,517)	(10,047)
Net deferred tax assets	93,029	71,069
Deferred tax liabilities:
State taxes	(690)	(1,643)
Deferred court costs	(25,277)	(19,550)
Difference in basis of amortizable assets	(14,988)	(10,682)
Difference in basis of depreciable assets	(9,163)	(7,868)
Differences in income recognition related to receivable portfolios	(17,432)	(16,308)
Deferred debt cancellation income	(1,957)	(2,602)
Other	(46)	(3,533)
Deferred tax liabilities gross	(69,553)	(62,186)
Net deferred tax asset	$ 23,476	$ 8,883