Quarterly report pursuant to Section 13 or 15(d)

Accumulated Other Comprehensive Income (Loss) (Details)

v3.3.1.900
Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
 9 Months Ended
Feb. 29, 2016
Feb. 28, 2015
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Accumulated other comprehensive income (loss), net of tax, beginning balance $ 311,761  
Accumulated other comprehensive income (loss), net of tax, ending balance 110,592  
Foreign currency translation    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Accumulated other comprehensive income (loss), net of tax, beginning balance (21,956) $ (13,765)
Other comprehensive income (loss) before reclassifications (3,099) (8,321)
Amounts reclassified from accumulated other comprehensive loss to net income   0
Accumulated other comprehensive income (loss), net of tax, ending balance (25,055) (22,086)
Defined benefit pension plans    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Accumulated other comprehensive income (loss), net of tax, beginning balance (1,022) (934)
Other comprehensive income (loss) before reclassifications 101 97
Amounts reclassified from accumulated other comprehensive loss to net income   15
Accumulated other comprehensive income (loss), net of tax, ending balance (921) (822)
AOCI    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Accumulated other comprehensive income (loss), net of tax, beginning balance (22,978) (14,699)
Other comprehensive income (loss) before reclassifications (2,998) (8,224)
Amounts reclassified from accumulated other comprehensive loss to net income   15
Accumulated other comprehensive income (loss), net of tax, ending balance $ (25,976) $ (22,908)