Fair Value Measurements (Tables)

9 Months Ended

Feb. 29, 2016

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Fair Value on Recurring Basis

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

	February 29, 2016
	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	$	187	$	—	$	—	$	187
Mutual funds	2,870		—		—		2,870
Total assets measured at fair value	$	3,057	$	—	$	—	$	3,057
Liabilities
SERP	$	3,057	$	—	$	—	$	3,057
Foreign exchange forward contracts	—		18		—		18
Total liabilities measured at fair value	$	3,057	$	18	$	—	$	3,075

	May 31, 2015
	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	$	166	$	—	$	—	$	166
Mutual funds	3,355		—		—		3,355
Total assets measured at fair value	$	3,521	$	—	$	—	$	3,521
Liabilities
SERP	$	3,521	$	—	$	—	$	3,521
Foreign exchange forward contracts	—		16		—		16
Total liabilities measured at fair value	$	3,521	$	16	$	—	$	3,537