Fair Value Disclosures (Detail) - Assets And Liabilities Measured At Fair Value On Recurring Basis - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Assets:
Assets measured at fair value on a recurring basis	$ 40,424	$ 38,259
Fair Value, Inputs, Level 1 | Deferred compensation plan assets
Assets:
Assets measured at fair value on a recurring basis	11,211	10,247
Fair Value, Inputs, Level 2
Assets:
Assets measured at fair value on a recurring basis	29,213	28,012
Liabilities:
Liabilities measured at fair value on a recurring basis	52,423	45,909
Fair Value, Inputs, Level 2 | Foreign currency forward contracts
Assets:
Assets measured at fair value on a recurring basis	39	165
Liabilities:
Liabilities measured at fair value on a recurring basis	198	485
Fair Value, Inputs, Level 2 | Interest rate swap contracts
Liabilities:
Liabilities measured at fair value on a recurring basis	6,630	2,349
Fair Value, Inputs, Level 2 | Deferred compensation plan assets
Assets:
Assets measured at fair value on a recurring basis	29,174	27,847
Fair Value, Inputs, Level 2 | Deferred compensation plan liabilities
Liabilities:
Liabilities measured at fair value on a recurring basis	$ 45,595	$ 43,075