Consolidated Statements Of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Aug. 31, 2013	Aug. 31, 2012
Net income	$ 106,889	$ 37,867
Other Comprehensive Income, Net of Tax:
Foreign currency translation adjustments	(13,414)	39,230
Pension and Other Postretirement Benefit Liability Adjustments (Net of Tax of $1,586 and $757, respectively)	2,924	1,206
Unrealized (Loss) on Securities (Net of Tax Benefit of $815 and $636, respectively)	(1,439)	(352)
Unrealized Gain on Derivatives (Net of Tax of $45 and $71, respectively)	109	187
Total Other Comprehensive (Loss) Income	(11,820)	40,271
Total Comprehensive Income	95,069	78,138
Less: Comprehensive Income Attributable to Noncontrolling Interests	7,627	13,033
Comprehensive Income Attributable to RPM International Inc. Stockholders	$ 87,442	$ 65,105