CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (USD $) In Thousands	Total	Total AAR Stockholders' Equity	Common Stock	Capital Surplus	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interest
Balance at May. 31, 2008	$ 650,867	$ 650,867	$ 43,932	$ 402,995	$ 317,887	$ (100,935)	$ (13,012)
Increase (Decrease) in Stockholders' Equity
Net income	56,772	56,772			56,772
Exercise of stock options and stock awards	553	553	67	1,365		(879)
Tax benefit related to share-based plans	171	171		171
Restricted stock activity	5,059	5,059	202	4,857
Bond hedge and warrant activity	(1,810)	(1,810)		(465)		(1,345)
Equity portion of bond repurchase	(3,894)	(3,894)		(3,894)
Foreign currency translation gain (loss)	(2,759)	(2,759)					(2,759)
Change in unrealized gains (losses) on investments, net of tax	(65)	(65)					(65)
Change in unrecognized pension and post retirement costs, net of tax	(8,160)	(8,160)					(8,160)
Balance at May. 31, 2009	696,734	696,734	44,201	405,029	374,659	(103,159)	(23,996)
Increase (Decrease) in Stockholders' Equity
Net income	43,202	44,628			44,628			(1,426)
Exercise of stock options and stock awards	4,020	4,020	217	4,753		(950)
Tax benefit related to share-based plans	817	817		817
Restricted stock activity	7,391	6,983	452	6,531				408
Bond hedge and warrant activity	(252)	(252)		86		(338)
Equity portion of bond repurchase	(374)	(374)		(374)
Foreign currency translation gain (loss)	(2,238)	(2,238)					(2,238)
Change in unrecognized pension and post retirement costs, net of tax	(3,412)	(3,412)					(3,412)
Contributions from noncontrolling interest	462							462
Balance at May. 31, 2010	746,350	746,906	44,870	416,842	419,287	(104,447)	(29,646)	(556)
Increase (Decrease) in Stockholders' Equity
Net income	69,826	69,826			69,826
Cash dividends	(2,983)	(2,983)			(2,983)
Exercise of stock options and stock awards	5,154	5,154	1	3,719		1,434
Tax benefit related to share-based plans	247	247		247
Restricted stock activity	8,156	8,156	115	2,783		5,258
Repurchase of shares	(2,539)	(2,539)				(2,539)
Bond hedge and warrant activity	(236)	(236)		(99)		(137)
Equity portion of bond repurchase	313	313		313
Foreign currency translation gain (loss)	3,290	3,290					3,290
Change in unrecognized pension and post retirement costs, net of tax	7,711	7,711					7,711
Balance at May. 31, 2011	$ 835,289	$ 835,845	$ 44,986	$ 423,805	$ 486,130	$ (100,431)	$ (18,645)	$ (556)

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