Other Assets - Components of Other Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Deferred tax assets	$ 51,077	$ 12,695
Identifiable intangible assets, net	28,243	15,712
Assets held for sale	21,147	911
Other financial receivables	18,732	11,275
Prepaid expenses	18,036	21,872
Service fee receivables	15,156	13,708
Receivable from seller	5,388	8,605
Security deposits	2,781	2,368
Derivative instruments	1,122	718
Prepaid income taxes	649	25,839
Other	53,116	35,059
Total	$ 215,447	$ 148,762