Earnings Per Share and Stock Plans (Narrative) (Details) (USD $)	12 Months Ended							12 Months Ended							12 Months Ended																	0 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012	Mar. 24, 2014	Mar. 31, 2014 Stock Options	Mar. 31, 2013 Stock Options	Mar. 31, 2012 Stock Options	Mar. 31, 2014 Restricted Stock	Mar. 31, 2013 Restricted Stock	Mar. 31, 2014 Performance Shares	Mar. 31, 2013 Performance Shares	Mar. 31, 2012 Performance Shares	Mar. 31, 2011 Performance Shares	Mar. 31, 2014 Long Term Incentive Plan	Mar. 31, 2014 Long Term Incentive Plan Stock Options	Mar. 31, 2013 Long Term Incentive Plan Stock Options	Mar. 31, 2012 Long Term Incentive Plan Stock Options	Mar. 31, 2014 Long Term Incentive Plan Stock Options Minimum	Mar. 31, 2014 Long Term Incentive Plan Stock Options Maximum	Mar. 31, 2014 Long Term Incentive Plan Restricted Stock	Mar. 31, 2013 Long Term Incentive Plan Restricted Stock	Mar. 31, 2014 Long Term Incentive Plan Restricted Stock Third Year	Mar. 31, 2014 Long Term Incentive Plan Restricted Stock Fourth Year	Mar. 31, 2014 Long Term Incentive Plan Restricted Stock Fifth Year	Mar. 31, 2014 Long Term Incentive Plan Directors Stock Plan	Mar. 31, 2013 Long Term Incentive Plan Directors Stock Plan	Mar. 31, 2012 Long Term Incentive Plan Directors Stock Plan	Mar. 31, 2014 Long Term Incentive Plan Cost of Goods Sold, Selling, and General and Administrative	Mar. 31, 2013 Long Term Incentive Plan Cost of Goods Sold, Selling, and General and Administrative	Mar. 31, 2012 Long Term Incentive Plan Cost of Goods Sold, Selling, and General and Administrative	Mar. 31, 2014 Non Qualified Stock Option Plan Stock Options	May 19, 2009 Shareholders Right Plan Directors Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares not included in the computation of diluted loss per share because they were antidilutive	16,000	189,000	184,000
Stock based compensation expense																									$ 315,000	$ 361,000	$ 360,000	$ 3,633,000	$ 3,334,000	$ 2,913,000
Total number of shares of common stock which may be granted under the plan														1,250,000
Shares available for future grants															632,067
Period options generally become exercisable								5 years		3 years																					4 years
Percentage of fair market value of common stock on the date of grant																		0.25	1
Exercise period from the date options were granted																		1 year	10 years
Number of options at the money															596,462	258,565
Closing stock price															26.79
Total intrinsic value of stock options exercised															3,251,000	332,000	1,466,000
Fair value of shares that vested (price per share)															8.11	9.21	8.96
Cash received from option exercises under all share-based payment arrangements															2,194,000	295,000
Unrecognized compensation cost related to non-vested stock options															2,064,000
Weighted average period of recognition for unrecognized compensation cost										1 year 8 months 12 days					2 years 8 months 12 days					3 years 6 months
Weighted-average Exercise Price					$ 17.05	$ 14.46	$ 14.46								$ 5.46	$ 28.45
Weighted-average fair value of options															$ 8.98	$ 6.70	$ 9.81
Vesting percentage																						33.00%	33.00%	33.00%
Total unrecognized compensation cost related to unvested restricted stock units										1,199,000										2,171,000
Fair value of restricted stock units that vested during the period																				1,571,000	1,025,000
Fair value of performance shares that vested during the period										0	0
Shares of restricted stock that vested during the period									1,000
Grant date fair value of shares that vested									$ 30.72
Shares of stock granted under the LTIP to non-executive directors																									12,642	25,552	21,248
Weighted average fair value grant price										$ 23.11	$ 21.47	$ 23.36	$ 19.20												$ 24.92	$ 14.09	$ 16.94
Dividend distribution declared per preferred share purchase right																																1.00
Percentage of common stock acquired																																$ 0.2
Percentage of newly created series A junior participating preferred shares																																0.10%
Exercise price per share																																80.00
Quarterly dividend rate per share				$ 0.04
Annual dividend rate per share				$ 0.16