Total Revenues Gross Profit and Long Lived Assets Excluding Long Term Deferred Tax Assets (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Revenues from External Customers and Long-Lived Assets
Total revenues	$ 111,424	$ 115,366
Gross profit	86,879	89,193
Long-lived assets	138,070		$ 143,716
Domestic
Revenues from External Customers and Long-Lived Assets
Total revenues	65,489	64,881
Gross profit	51,442	49,534
Long-lived assets	115,221		118,168
EMEA
Revenues from External Customers and Long-Lived Assets
Total revenues	35,473	37,675
Gross profit	27,176	29,528
Long-lived assets	12,341		13,636
Other Regions
Revenues from External Customers and Long-Lived Assets
Total revenues	10,462	12,810
Gross profit	8,261	$ 10,131
Long-lived assets	$ 10,508		$ 11,912