XML 56 R43.htm IDEA: XBRL DOCUMENT v3.6.0.2
LONG-TERM DEBT AND CREDIT FACILITIES - Schedule of effect on other comprehensive income (loss) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Nov. 30, 2016
Nov. 30, 2015
Nov. 30, 2016
Nov. 30, 2015
Derivatives in cash flow hedging relationships:        
Amount of gain (loss) recognized in other comprehensive loss $ 7,089 $ (3,968) $ 3,884 $ (4,000)
Amount of loss recognized in interest expense $ 1,768 $ 2,467 $ 3,665 $ 4,201