Fair Value Measurements (Tables)

6 Months Ended

Nov. 30, 2014

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Fair Value on Recurring Basis

Our assets measured at fair value on a recurring basis were determined as follows:

	November 30, 2014
	Quoted Prices in Active Markets for Identical Instruments (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total Balance
Assets
SERP
Money market fund	$	153	$	—	$	—	$	153
Mutual funds	3,241		—		—		3,241
Foreign exchange forward contracts	—		401		—		401
Total assets measured at fair value	$	3,394	$	401	$	—	$	3,795

	May 31, 2014
	Quoted Prices in Active Markets for Identical Instruments (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total Balance
Assets
SERP
Money market fund	$	323	$	—	$	—	$	323
Mutual funds	3,095		—		—		3,095
Foreign exchange forward contracts	—		9		—		9
Total assets measured at fair value	$	3,418	$	9	$	—	$	3,427