Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Basic [Abstract]
(Loss) earnings from continuing operations	$ (1,055)	$ 12,566
Less: Net earnings (loss) attributable to noncontrolling interest	301	(9)
(Loss) earnings from continuing operations attributable to Modine	(1,356)	12,575
Less: Undistributed earnings attributable to unvested shares	0	(48)
Net (loss) earnings from continuing operations available to Modine common shareholders	(1,356)	12,527
Net earnings from discontinued operations	177	0
Less: Undistributed earnings attributable to unvested shares	(1)	0
Net earnings from discontinued operations available to Modine common shareholders	176	0
Net (loss) earnings available to Modine common shareholders	(1,180)	12,527
Basic Earnings Per Share [Abstract]
Weighted average shares outstanding - basic	46,546	46,361
(Loss) earnings from continuing operations per common share	$ (0.03)	$ 0.27
Net earnings from discontinued operations per common share	$ 0	$ 0
Net (loss) earnings per common share - basic	$ (0.03)	$ 0.27
Diluted [Abstract]
(Loss) earnings from continuing operations	(1,055)	12,566
Less: Net earnings (loss) attributable to noncontrolling interest	301	(9)
(Loss) earnings from continuing operations attributable to Modine	(1,356)	12,575
Less: Undistributed earnings attributable to unvested shares	0	(31)
Net (loss) earnings from continuing operations available to Modine common shareholders	(1,356)	12,544
Net earnings from discontinued operations	177	0
Less: Undistributed earnings attributable to unvested shares	(1)	0
Net earnings from discontinued operations available to Modine common shareholders	176	0
Net (loss) earnings available to Modine common shareholders	$ (1,180)	$ 12,544
Diluted Earnings Per Share [Abstract]
Weighted average shares outstanding - basic	46,546	46,361
Effect of dilutive securities	0	619
Weighted average shares outstanding - diluted	46,546	46,980
(Loss) earnings from continuing operations per common share	$ (0.03)	$ 0.27
Net earnings from discontinued operations per common share	$ 0	$ 0
Net (loss) earnings per common share - diluted	$ (0.03)	$ 0.27
Potential dilutive securities	336
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)	1,330	1,165
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)	149	152