Fair Value Disclosures (Detail) - Assets And Liabilities Measured At Fair Value On Recurring Basis - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Assets:
Assets measured at fair value on a recurring basis	$ 32,958	$ 35,108
Fair Value, Inputs, Level 1 | Deferred compensation plan assets
Assets:
Assets measured at fair value on a recurring basis	7,759	7,650
Fair Value, Inputs, Level 2
Assets:
Assets measured at fair value on a recurring basis	25,199	27,458
Liabilities:
Liabilities measured at fair value on a recurring basis	51,478	42,220
Fair Value, Inputs, Level 2 | Foreign currency forward contracts
Assets:
Assets measured at fair value on a recurring basis	6	458
Liabilities:
Liabilities measured at fair value on a recurring basis	73	220
Fair Value, Inputs, Level 2 | Interest rate swap contract
Liabilities:
Liabilities measured at fair value on a recurring basis	13,700	2,900
Fair Value, Inputs, Level 2 | Deferred compensation plan assets
Assets:
Assets measured at fair value on a recurring basis	25,193	27,000
Fair Value, Inputs, Level 2 | Deferred compensation plan liabilities
Liabilities:
Liabilities measured at fair value on a recurring basis	$ 37,705	$ 39,100