CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011	Dec. 31, 2010
CONSOLIDATED STATEMENTS OF OPERATIONS [Abstract]
Net sales	$ 373,282	$ 360,043	$ 1,188,435	$ 1,051,477
Cost of sales	313,539	303,496	997,242	880,185
Gross profit	59,743	56,547	191,193	171,292
Selling, general and administrative expenses	43,523	47,405	143,036	136,323
Income from operations	16,220	9,142	48,157	34,969
Interest expense	2,893	2,602	9,180	30,239
Other expense (income) - net	1,667	(179)	7,552	(2,191)
Earnings from continuing operations before income taxes	11,660	6,719	31,425	6,921
Provision for income taxes	3,618	1,134	9,642	10,000
Earnings (loss) from continuing operations	8,042	5,585	21,783	(3,079)
Earnings (loss) from discontinued operations (net of income taxes)	364	(34)	737	(3,042)
Net earnings (loss)	8,406	5,551	22,520	(6,121)
Less: Net earnings attributable to noncontrolling interest	110	0	139	0
Net earnings (loss) attributable to Modine	$ 8,296	$ 5,551	$ 22,381	$ (6,121)
Earnings (loss) from continuing operations per common share:
Basic (in dollars per share)	$ 0.17	$ 0.12	$ 0.46	$ (0.07)
Diluted (in dollars per share)	$ 0.17	$ 0.12	$ 0.46	$ (0.07)
Net earnings (loss) per common share:
Basic (in dollars per share)	$ 0.18	$ 0.12	$ 0.48	$ (0.13)
Diluted (in dollars per share)	$ 0.18	$ 0.12	$ 0.48	$ (0.13)