Consolidated Statements of Comprehensive Loss (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Feb. 28, 2014	Feb. 28, 2013	Feb. 28, 2014	Feb. 28, 2013
Net loss	$ (21,769)	$ (5,814)	$ (38,979)	$ (19,594)
Other comprehensive income
Unrealized actuarial gain (loss) of defined benefit plans net of tax expense (benefit) of $1,813, $0, $1,813 and $(32), respectively	3,144	0	3,144	(55)
Reclassification of actuarial loss of defined benefit plans, net of tax benefit of $(6), $(55) , $(19) and $(355), respectively	13	96	33	616
Total other comprehensive income	3,157	96	3,177	561
Comprehensive loss	$ (18,612)	$ (5,718)	$ (35,802)	$ (19,033)