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Schedule of Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Components Of Income Tax Expense Benefit Continuing Operations [Abstract]
Federal, Current	$ (1,916)	$ 48,794	$ 18,453
State, Current	1,656	4,077	3,681
Foreign, Current	6,460	4,074	4,941
Income tax expense (benefit), Current, total	6,200	56,945	27,075
Federal, Deferred	(6,071)	(1,649)	(4,165)
State, Deferred	(2,047)	(1,260)	(801)
Foreign, Deferred	(101)	(757)	585
Income tax expense (benefit), Deferred, total	(8,219)	(3,666)	(4,381)
Total (benefit) provision	$ (2,019)	$ 53,279	$ 22,694

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