Earnings Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Basic Earnings Per Share [Abstract]
(Loss) earnings from continuing operations	$ (11,848)	$ 1,000	$ (12,903)	$ 13,566
Less: Net earnings attributable to noncontrolling interest	(267)	(38)	(568)	(29)
(Loss) earnings from continuing operations attributable to Modine	(12,115)	962	(13,471)	13,537
Less: Undistributed earnings attributable to unvested shares	0	(3)	0	(51)
Net (loss) earnings from continuing operations available to Modine shareholders	(12,115)	959	(13,471)	13,486
Net (loss) earnings from discontinued operations	(105)	373	72	373
Less: Undistributed earnings attributable to unvested shares	0	(1)	(1)	(1)
Net (loss) earnings from discontinued operations available to Modine shareholders	(105)	372	71	372
Net (loss) earnings available to Modine shareholders	(12,220)	1,331	(13,400)	13,858
Weighted average shares outstanding - basic (in shares)	46,584	46,477	46,565	46,419
(Loss) earnings from continuing operations per share (in dollars per share)	$ (0.26)	$ 0.02	$ (0.29)	$ 0.29
Net earnings from discontinued operations per share (in dollars per share)	$ 0	$ 0.01	$ 0	$ 0.01
Net (loss) earnings per share - basic (in dollars per share)	$ (0.26)	$ 0.03	$ (0.29)	$ 0.30
Diluted Earnings Per Share [Abstract]
(Loss) earnings from continuing operations	(11,848)	1,000	(12,903)	13,566
Less: Net earnings attributable to noncontrolling interest	(267)	(38)	(568)	(29)
(Loss) earnings from continuing operations attributable to Modine	(12,115)	962	(13,471)	13,537
Less: Undistributed earnings attributable to unvested shares	0	(4)	0	(35)
Net (loss) earnings from continuing operations available to Modine shareholders	(12,115)	958	(13,471)	13,502
Net (loss) earnings from discontinued operations	(105)	373	72	373
Less: Undistributed earnings attributable to unvested shares	0	(1)	(1)	(1)
Net (loss) earnings from discontinued operations available to Modine shareholders	(105)	372	71	372
Net (loss) earnings available to Modine shareholders	$ (12,220)	$ 1,330	$ (13,400)	$ 13,874
Weighted average shares outstanding - basic (in shares)	46,584	46,477	46,565	46,419
Effect of dilutive securities (in shares)	0	381	0	500
Weighted average shares outstanding - diluted (in shares)	46,584	46,858	46,565	46,919
(Loss) earnings from continuing operations per share (in dollars per share)	$ (0.26)	$ 0.02	$ (0.29)	$ 0.29
Net earnings from discontinued operations per share (in dollars per share)	$ 0	$ 0.01	$ 0	$ 0.01
Net (loss) earnings per share - diluted (in dollars per share)	$ (0.26)	$ 0.03	$ (0.29)	$ 0.30
Potential dilutive securities	228		282
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earning per share (in shares)	1,273	1,497	1,273	1,497
Restricted Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earning per share (in shares)	146	189	131	189