Other Assets and Other Liabilities - Schedule of Other Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Other Liabilities Disclosure [Abstract]
Accrued expenses	$ 124,721	$ 128,496
Current income taxes and other taxes	99,278	109,438
Employee benefit-related liabilities	84,703	81,687
Deferred lease incentives	84,287	83,566
Unclaimed funds at LFB	24,997	26,022
Abandoned leased space (principally in the U.K.)	4,973	8,760
Deferred revenue	35,717	30,178
Contingent consideration liability	22,608
Securities sold, not yet purchased	4,482	3,239
Other	44,475	28,556
Total	$ 530,241	$ 499,942