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Provision for Income Taxes (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Current income tax expense:      
Federal $ 4,140 $ 9,215 $ 8,428
State and local 150 749 606
Foreign 24,672 32,844 24,622
Total current income tax expense 28,962 42,808 33,656
Deferred income tax expense (benefit):      
Federal 15,207 (10,597) (3,051)
State and local 2,308 (742) (183)
Foreign (12,449) 2,496 3,123
Total deferred income tax expense 5,066 (8,843) (111)
Total tax expense $ 34,028 $ 33,965 $ 33,545