XML 55 R41.htm IDEA: XBRL DOCUMENT v3.5.0.2
Income Before Income Taxes (Detail) - USD ($)
$ in Thousands
12 Months Ended
May 31, 2016
May 31, 2015
May 31, 2014
Income Before Income Taxes [Line Items]      
Income Before Income Taxes $ 55,513 $ 52,076 $ 43,031
U.S.      
Income Before Income Taxes [Line Items]      
Income Before Income Taxes 50,662 45,156 37,568
Foreign      
Income Before Income Taxes [Line Items]      
Income Before Income Taxes $ 4,851 $ 6,920 $ 5,463