Consolidated Statements of Shareholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Shares, Issued	Common Shares, In Treasury	Capital in excess of stated value	Retained earnings	Accumulated other comprehensive income (loss)
Beginning Balance at Mar. 31, 2009	$ 192,717	$ 9,457	$ (2,669)	$ (11,128)	$ 199,947	$ (2,890)
Beginning Balance, shares at Mar. 31, 2009		31,524	(8,897)
Cash dividends ($0.06 per share)	(1,360)				(1,360)
Non-cash share based compensation expense	1,588			1,588
Restricted shares issued	838	21	59	758
Restricted shares issued, shares		70	197
Shares issued upon exercise of stock options and SSARs	89	4	8	77
Shares issued upon exercise of stock options and SSARs, shares		13	25
Tax deficit related to exercise of stock options	(65)			(65)
Comprehensive income (loss):
Net (loss) income	3,547				3,547
Unrealized translation adjustment	1,320					1,320
Unrealized loss on securities	91					91
Net actuarial gains and prior service cost on curtailment of defined benefit pension plans, net of taxes $104 and $467 in 2010 and 2011	159					159
Total comprehensive (loss) income	5,117
Ending Balance at Mar. 31, 2010	198,924	9,482	(2,602)	(8,770)	202,134	(1,320)
Ending Balance, shares at Mar. 31, 2010		31,607	(8,675)
Non-cash share based compensation expense	2,553			2,553
Restricted shares issued	1,061		33	1,028
Restricted shares issued, shares			110
Shares issued upon exercise of stock options and SSARs			6	(6)
Shares issued upon exercise of stock options and SSARs, shares			23
Shares withheld for taxes upon exercise of stock options and SSARs or vesting of restricted shares	(238)		(12)	(226)
Shares withheld for taxes upon exercise of stock options and SSARs or vesting of restricted shares, shares			(42)
Comprehensive income (loss):
Net (loss) income	(55,475)				(55,475)
Unrealized translation adjustment	565					565
Net actuarial gains and prior service cost on curtailment of defined benefit pension plans, net of taxes $104 and $467 in 2010 and 2011	714					714
Total comprehensive (loss) income	(54,196)
Ending Balance at Mar. 31, 2011	148,104	9,482	(2,575)	(5,421)	146,659	(41)
Ending Balance, shares at Mar. 31, 2011	23,022,398	31,607	(8,584)
Purchase of treasury shares	(13,173)		(481)	(12,692)
Purchase of treasury shares, shares			(1,600)
Non-cash share based compensation expense	2,368			2,368
Restricted shares issued	1,089		39	1,050
Restricted shares issued, shares			130
Shares issued upon exercise of stock options and SSARs	210		179	31
Shares issued upon exercise of stock options and SSARs, shares			595
Shares withheld for taxes upon exercise of stock options and SSARs or vesting of restricted shares	(1,449)		(81)	(1,368)
Shares withheld for taxes upon exercise of stock options and SSARs or vesting of restricted shares, shares			(272)
Comprehensive income (loss):
Net (loss) income	(22,783)				(22,783)
Unrealized translation adjustment	76					76
Unrealized loss on securities	(4)					(4)
Total comprehensive (loss) income	(22,711)
Ending Balance at Mar. 31, 2012	$ 114,438	$ 9,482	$ (2,919)	$ (16,032)	$ 123,876	$ 31
Ending Balance, shares at Mar. 31, 2012	21,875,850	31,607	(9,731)