Other Assets - Components of Other Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Deferred tax assets	$ 54,804	$ 51,077
Identifiable intangible assets, net	29,702	28,243
Assets held for sale	26,977	21,147
Other financial receivables	22,241	15,156
Service fee receivables	20,480	18,036
Prepaid expenses	18,367	18,732
Receivable from seller	3,748	1,122
Security deposits	3,180	2,781
Derivative instruments	5,388	5,388
Other	54,331	53,765
Total	$ 239,218	$ 215,447