Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Aug. 31, 2014	Aug. 31, 2013
Net Income	$ 104,839	$ 106,889
Other comprehensive income, net of tax:
Foreign currency translation adjustments	(21,266)	(13,414)
Pension and other postretirement benefit liability adjustments (net of tax of $1,455 and $1,586, respectively)	2,929	2,924
Unrealized gain (loss) on securities (net of tax of $114 and $(815), respectively)	76	(1,439)
Unrealized gain (loss) on derivatives (net of tax of $(42) and $45, respectively)	(66)	109
Total other comprehensive income	(18,327)	(11,820)
Total Comprehensive Income	86,512	95,069
Less: Comprehensive Income Attributable to Noncontrolling Interests	2,380	7,627
Comprehensive Income Attributable to RPM International Inc. Stockholders	$ 84,132	$ 87,442