Consolidated Statements of Changes in Stockholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock	Additional Paid-In Capital	Retained Earnings (Deficit)	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Balance at Mar. 31, 2010	$ 284,272	$ 295	$ 479,705	$ (150,789)	$ 11,990	$ (56,929)
Balance (in shares) at Mar. 31, 2010		27,045,000
Increase (Decrease) in Stockholders' Equity
Net income (loss)	63,044			63,044
Other comprehensive income (loss)	10,565				10,565
Issuance of restricted shares			(1,078)			1,078
Issuance of restricted shares (in shares)		47,000
Stock-based compensation expense	1,783		1,783
Issuance of shares to K Equity, LLC		100	(100)
Issuance of shares to K Equity, LLC (in shares)		10,000,000
Exercise of stock options	89		(988)			1,077
Exercise of stock options (in shares)		46,000
Balance at Mar. 31, 2011	359,753	395	479,322	(87,745)	22,555	(54,774)
Balance (in shares) at Mar. 31, 2011		37,138,000
Increase (Decrease) in Stockholders' Equity
Net income (loss)	6,692			6,692
Other comprehensive income (loss)	(10,535)				(10,535)
Issuance of restricted shares	(279)		(9,483)			9,204
Issuance of restricted shares (in shares)		398,000
Stock-based compensation expense	3,075		3,075
Issuance of shares to K Equity, LLC		70	(70)
Issuance of shares to K Equity, LLC (in shares)		7,000,000
Exercise of stock options	290		(2,785)			3,075
Exercise of stock options (in shares)		133,000
Balance at Mar. 31, 2012	358,996	465	470,059	(81,053)	12,020	(42,495)
Balance (in shares) at Mar. 31, 2012		44,669,000
Increase (Decrease) in Stockholders' Equity
Net income (loss)	(82,182)			(82,182)
Other comprehensive income (loss)	(4,326)				(4,326)
Issuance of restricted shares	(282)		(6,511)			6,229
Issuance of restricted shares (in shares)		270,000
Stock-based compensation expense	4,599		4,599
Exercise of stock options	111		(1,051)			1,162
Exercise of stock options (in shares)		50,000
Balance at Mar. 31, 2013	$ 276,916	$ 465	$ 467,096	$ (163,235)	$ 7,694	$ (35,104)
Balance (in shares) at Mar. 31, 2013		44,989,000