Total Revenues Gross Profit and Long Lived Assets Excluding Long Term Deferred Tax Assets (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Revenues from External Customers and Long-Lived Assets
Total revenues	$ 127,408	$ 119,693	$ 349,416	$ 352,796
Gross profit	105,672	95,878	279,146	277,458
Long-lived assets	520,932		520,932		$ 143,716
Domestic
Revenues from External Customers and Long-Lived Assets
Total revenues	78,763	68,063	206,318	200,282
Gross profit	67,055	54,410	166,566	156,938
Long-lived assets	499,074		499,074		118,168
EMEA
Revenues from External Customers and Long-Lived Assets
Total revenues	36,884	39,184	109,835	115,816
Gross profit	29,728	31,313	86,760	91,520
Long-lived assets	11,615		11,615		13,636
Other Regions
Revenues from External Customers and Long-Lived Assets
Total revenues	11,761	12,446	33,263	36,698
Gross profit	8,889	$ 10,155	25,820	$ 29,000
Long-lived assets	$ 10,243		$ 10,243		$ 11,912