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Total Revenues Gross Profit and Long Lived Assets Excluding Long Term Deferred Tax Assets (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Revenues from External Customers and Long-Lived Assets          
Total revenues $ 120,610 $ 123,142 $ 241,186 $ 242,157  
Gross profit 96,235 99,041 193,679 195,233  
Long-lived assets 66,043   66,043   $ 71,628
Domestic          
Revenues from External Customers and Long-Lived Assets          
Total revenues 74,284 73,907 147,738 145,914  
Gross profit 59,153 59,385 118,098 116,968  
Long-lived assets 61,001   61,001   67,031
EMEA          
Revenues from External Customers and Long-Lived Assets          
Total revenues 33,977 36,525 67,743 72,197  
Gross profit 26,976 29,066 54,220 57,948  
Long-lived assets 3,222   3,222   3,256
Other Regions          
Revenues from External Customers and Long-Lived Assets          
Total revenues 12,349 12,710 25,705 24,046  
Gross profit 10,106 $ 10,590 21,361 $ 20,317  
Long-lived assets $ 1,820   $ 1,820   $ 1,341