CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2010
CONSOLIDATED STATEMENTS OF OPERATIONS [Abstract]
Net sales	$ 1,577,152	$ 1,448,235	$ 1,162,576
Cost of sales	1,320,582	1,215,979	990,408
Gross profit	256,570	232,256	172,168
Selling, general and administrative expenses	189,046	189,335	168,038
Income from operations	67,524	42,921	4,130
Interest expense	12,483	33,723	22,888
Other (income) expense - net	7,130	(3,625)	(5,586)
Earnings (loss) from continuing operations before income taxes	47,911	12,823	(13,172)
Provision for income taxes	9,931	4,543	9,673
Earnings (loss) from continuing operations	37,980	8,280	(22,845)
Earnings (loss) from discontinued operations (net of income taxes)	824	(3,047)	(8,981)
Net earnings (loss)	38,804	5,233	(31,826)
Less: Net earnings attributable to noncontrolling interest	343	0	0
Net earnings (loss) attributable to Modine	$ 38,461	$ 5,233	$ (31,826)
Earnings (loss) from continuing operations per common share:
Basic (in dollars per share)	$ 0.81	$ 0.18	$ (0.58)
Diluted (in dollars per share)	$ 0.80	$ 0.18	$ (0.58)
Net earnings (loss) per common share:
Basic (in dollars per share)	$ 0.83	$ 0.11	$ (0.81)
Diluted (in dollars per share)	$ 0.82	$ 0.11	$ (0.81)