Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred tax assets:
State taxes	$ 2,758	$ 1,408
Stock-based compensation expense	7,250	8,888
Accrued expenses	5,015	2,957
Non-qualified plan	97	(136)
Deferred revenue	38,529
Cash flow hedge instruments	1,588	1,037
State and international operating losses	6,490	51
Fixed asset basis-International	86	(26)
Capitalized legal fees-International	1,609
Cumulative translation adjustment	1,509
Tax benefit of uncertain tax positions	4,237
Valuation allowance	(3,595)	(13)
Net deferred tax assets	65,573	14,166
Deferred tax liabilities:
Deferred court costs	(15,445)	(15,013)
Difference in basis of amortizable assets	(12,200)	(7,898)
Difference in basis of depreciable assets	(6,834)	(4,134)
Differences in income recognition related to receivable portfolios	(20,773)	5,723
Deferred debt cancellation income	(1,222)	(1,222)
Other	(2,289)	142
Deferred tax liabilities gross	(58,763)	(22,402)
Net deferred tax asset (liability)	$ 6,810	$ (8,236)