Other Assets - Components of Other Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Debt issuance costs, net of amortization	$ 45,033	$ 38,504
Prepaid income taxes	28,159	0
Deferred tax assets	27,306	33,716
Prepaid expenses	22,002	21,427
Interest receivable	21,079	12,187
Identifiable intangible assets, net	18,129	21,564
Service fee receivables	13,708	7,864
Other financial receivables	11,275	7,467
Receivable from seller	8,605	7,357
Recoverable fees	5,350	2,905
Security deposits	2,809	3,617
Funds held in escrow	0	16,889
Other	42,165	24,169
Total other assets	$ 245,620	$ 197,666