Consolidated Statements of Stockholders' Equity and Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	Total	Common Stock	Additional Paid-in Capital	Treasury Stock	Foreign Currency Translation Adjustment	Derivative Instruments	Defined Benefit Pension	Retained Earnings
Balance at Mar. 31, 2009	$ 647,299	$ 25	$ 445,774	$ (323,095)	$ 6,375	$ 65	$ (2,868)	$ 521,023
Balance, shares at Mar. 31, 2009		25,159
Comprehensive income (loss)
Net income (loss)	34,503							34,503
Foreign currency translation adjustment	6,923				6,923
Pension, net of taxes
Actuarial gain (loss)	(284)						(284)
Actuarial gain (loss) reclassified into results of operations	145						145
Derivative Instruments, net of taxes
Net change in fair value of cash flow hedges	(646)					(646)
Amounts reclassified into results of operations	261					261
Comprehensive income (loss)	40,902
Stock compensation expense	6,775		6,775
Dividends declared	(4,211)							(4,211)
Issuance of common stock (in shares)		15
Issuance of common stock	0	0	0
Repurchases of common stock	0
Tax impact from stock options	(771)		(771)
Balance at Mar. 31, 2010	689,994	25	451,778	(323,095)	13,298	(320)	(3,007)	551,315
Balance, shares at Mar. 31, 2010		25,174
Comprehensive income (loss)
Net income (loss)	52,862							52,862
Foreign currency translation adjustment	10,616				10,616
Pension, net of taxes
Actuarial gain (loss)	(1,360)						(1,360)
Actuarial gain (loss) reclassified into results of operations	140						140
Derivative Instruments, net of taxes
Net change in fair value of cash flow hedges	(291)					(291)
Amounts reclassified into results of operations	447					447
Comprehensive income (loss)	62,414
Stock compensation expense	10,270		10,270
Dividends declared	(4,254)							(4,254)
Issuance of common stock (in shares)		387
Issuance of common stock	9,240	1	9,239
Repurchases of common stock	(485)			(485)
Tax impact from stock options	(920)		(920)
Balance at Mar. 31, 2011	766,259	26	470,367	(323,580)	23,914	(164)	(4,227)	599,923
Balance, shares at Mar. 31, 2011	25,561	25,561
Comprehensive income (loss)
Net income (loss)	(247,734)							(247,734)
Foreign currency translation adjustment	(6,868)				(6,868)
Pension, net of taxes
Actuarial gain (loss)	(5,503)						(5,503)
Actuarial gain (loss) reclassified into results of operations	99						99
Derivative Instruments, net of taxes
Net change in fair value of cash flow hedges	(143)					(143)
Amounts reclassified into results of operations	(154)					154
Comprehensive income (loss)	(259,995)
Stock compensation expense	9,296		9,296
Dividends declared	(4,947)							(4,947)
Issuance of common stock (in shares)		169
Issuance of common stock	0	0	0
Repurchases of common stock	(15,292)			(15,292)
Tax impact from stock options	(937)		(937)
Balance at Mar. 31, 2012	$ 494,384	$ 26	$ 478,726	$ (338,872)	$ 17,046	$ (153)	$ (9,631)	$ 347,242
Balance, shares at Mar. 31, 2012	25,730	25,730