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Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current:
Federal	$ (1,197)	$ (235)	$ 5,641
State	(3)	(151)	1,777
Foreign	2,831	2,956	2,121
Deferred:
Federal	2,177	2,867	650
State	403	1,548	(365)
Foreign	(1,131)	(1,783)	(679)
Total income tax expense (benefit)	$ 3,080	$ 5,202	$ 9,145

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