Fair Value Measurements (Tables)

12 Months Ended

May 31, 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:

	May 31, 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	$	182	$	—	$	—	$	182
Mutual funds	2,907		—		—		2,907
Total assets measured at fair value	$	3,089	$	—	$	—	$	3,089
Liabilities
SERP	$	3,089	$	—	$	—	$	3,089
Foreign exchange forward contracts	—		6		—		6
Total liabilities measured at fair value	$	3,089	$	6	$	—	$	3,095

	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