Fair Value Disclosures (Detail) - Assets And Liabilities Measured At Fair Value On Recurring Basis - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Assets:
Assets measured at fair value on a recurring basis	$ 34,755	$ 35,108
Liabilities:
Liabilities measured at fair value on a recurring basis	44,578	42,220
Level 1
Assets:
Deferred compensation plan assets	8,671	7,650
Assets measured at fair value on a recurring basis	8,671	7,650
Level 2
Assets:
Deferred compensation plan assets	25,474	27,000
Assets measured at fair value on a recurring basis	26,084	27,458
Liabilities:
Deferred compensation liability	39,071	39,100
Liabilities measured at fair value on a recurring basis	44,578	42,220
Level 2 | Foreign currency forward contracts
Assets:
Derivative asset	610	458
Liabilities:
Derivative liability	375	220
Level 2 | Interest rate swap contracts
Liabilities:
Derivative liability	$ 5,132	$ 2,900