XML 80 R69.htm IDEA: XBRL DOCUMENT v3.3.1.900
Income Tax - Change in Valuation Allowance (Details) - USD ($)
$ in Thousands
 12 Months Ended
May. 31, 2015
May. 31, 2014
Movement in Deferred Tax Valuation Allowance [Roll Forward]    
Valuation allowance, beginning of period $ (7,199) $ (28,464)
Valuation allowance, end of period (3,823) (7,199)
Other    
Movement in Deferred Tax Valuation Allowance [Roll Forward]    
Valuation allowance, change (11) 382
Foreign Tax Authority | Utilization of foreign net operating loss carryforwards    
Movement in Deferred Tax Valuation Allowance [Roll Forward]    
Valuation allowance, change $ 3,387 2,822
Foreign Tax Authority | Allowance for foreign tax credit carryforward    
Movement in Deferred Tax Valuation Allowance [Roll Forward]    
Valuation allowance, change   $ 18,061