Fair Value Disclosures (Detail) - Assets And Liabilities Measured At Fair Value On Recurring Basis - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Assets:
Assets measured at fair value on a recurring basis	$ 35,856	$ 34,755
Fair Value, Inputs, Level 1 | Deferred compensation plan assets
Assets:
Assets measured at fair value on a recurring basis	9,978	8,671
Fair Value, Inputs, Level 2
Assets:
Assets measured at fair value on a recurring basis	25,878	26,084
Liabilities:
Liabilities measured at fair value on a recurring basis	61,042	44,578
Fair Value, Inputs, Level 2 | Foreign currency forward contracts
Assets:
Assets measured at fair value on a recurring basis	22	610
Liabilities:
Liabilities measured at fair value on a recurring basis	115	375
Fair Value, Inputs, Level 2 | Interest rate swap contract
Liabilities:
Liabilities measured at fair value on a recurring basis	20,263	5,132
Fair Value, Inputs, Level 2 | Deferred compensation plan assets
Assets:
Assets measured at fair value on a recurring basis	25,856	25,474
Fair Value, Inputs, Level 2 | Deferred compensation plan liabilities
Liabilities:
Liabilities measured at fair value on a recurring basis	$ 40,664	$ 39,071