CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) [Abstract]
Net sales	$ 397,290	$ 345,902	$ 815,153	$ 691,434
Cost of sales	335,271	290,133	683,703	576,689
Gross profit	62,019	55,769	131,450	114,745
Selling, general and administrative expenses	50,075	46,718	99,513	88,918
Income from operations	11,944	9,051	31,937	25,827
Interest expense	3,297	23,529	6,287	27,637
Other expense (income) - net	6,027	(5,610)	5,885	(2,012)
Earnings (loss) from continuing operations before income taxes	2,620	(8,868)	19,765	202
Provision for income taxes	1,995	4,822	6,024	8,866
Earnings (loss) from continuing operations	625	(13,690)	13,741	(8,664)
Earnings (loss) from discontinued operations (net of income taxes)	389	(2,900)	389	(2,932)
Loss on sale of discontinued operations (net of income taxes)	(16)	(70)	(16)	(76)
Net earnings (loss)	998	(16,660)	14,114	(11,672)
Less: Net earnings attributable to noncontrolling interest	38	0	29	0
Net earnings (loss) attributable to Modine	$ 960	$ (16,660)	$ 14,085	$ (11,672)
Earnings (loss) from continuing operations attributable to Modine common shareholders:
Basic (in dollars per share)	$ 0.01	$ (0.30)	$ 0.29	$ (0.19)
Diluted (in dollars per share)	$ 0.01	$ (0.30)	$ 0.29	$ (0.19)
Net earnings (loss) attributable to Modine common shareholders:
Basic (in dollars per share)	$ 0.02	$ (0.36)	$ 0.30	$ (0.25)
Diluted (in dollars per share)	$ 0.02	$ (0.36)	$ 0.30	$ (0.25)