Derivatives and Hedging (Detail) - Outstanding Derivatives Contracts	12 Months Ended
	Dec. 31, 2016 USD ($) contract outstanding_contract	Dec. 31, 2015 USD ($) outstanding_contract
Derivatives, Fair Value [Line Items]
Number of Outstanding Contracts | outstanding_contract	87	105
Contract Notional Amount	$ 786,946,000	$ 893,610,000
Fair Value Asset (Liability)	(2,669,000)	(4,897,000)
AOCI Unrealized (Loss), Net Of Tax	$ (1,409,000)	$ (3,079,000)
Interest rate swap
Derivatives, Fair Value [Line Items]
Number of Outstanding Contracts | contract	3
Contract Notional Amount	$ 700,000,000.0
Other liabilities | Interest rate swap | Designated as hedging instrument
Derivatives, Fair Value [Line Items]
Number of Outstanding Contracts | outstanding_contract	3	3
Contract Notional Amount	$ 700,000,000	$ 700,000,000
Fair Value Asset (Liability)	(2,349,000)	(5,132,000)
AOCI Unrealized (Loss), Net Of Tax	$ (1,409,000)	$ (3,079,000)
Other current assets | Foreign currency forwards
Derivatives, Fair Value [Line Items]
Number of Outstanding Contracts | outstanding_contract	84	102
Contract Notional Amount	$ 86,946,000	$ 193,610,000
Fair Value Asset (Liability)	(320,000)	235,000
AOCI Unrealized (Loss), Net Of Tax	$ 0	$ 0