Other Assets - Components of Other Assets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]
Service fee receivables	$ 29,931
Debt issuance costs, net of amortization	28,066	14,397
Identifiable intangible assets, net	23,549	487
Prepaid expenses	23,487	6,399
Deferred tax assets	13,974
Other financial receivables	7,962
Interest receivable	7,956	4,042
Prepaid income taxes	5,009
Recoverable legal fees	3,049	1,521
Security deposits	2,500	1,696
Other	9,300	2,993
Total other assets	$ 154,783	$ 31,535