LONG-TERM DEBT (Tables)

12 Months Ended

Mar. 31, 2013

LONG-TERM DEBT

Information related to availability on Credit Agreement

	March 31, 2013		March 31, 2012
Available borrowings	$	73,565	$	79,069
Outstanding letters of credit		1,664		1,664

4.375% convertible notes due 2014

LONG-TERM DEBT

Information about carrying amount and components of interest expense of convertible notes

	March 31,
	2013		2012
Additional paid-in capital	$	42,018	$	42,018
Principal amount of 4.375% Convertible Notes	$	138,000	$	138,000
Unamortized discount of the liability component		12,819		22,369
Net carrying amount of 4.375% Convertible Notes	$	125,181	$	115,631
Carrying amount of debt issuance costs	$	797	$	1,479

	Fiscal Year Ended March 31,
	2013		2012		2011
Cash interest expense (coupon interest expense)	$	6,038	$	6,038	$	6,004
Non-cash amortization of discount on 4.375% Convertible Notes		9,550		8,392		7,374
Amortization of debt issuance costs		682		682		682
Total interest expense related to 4.375% Convertible Notes	$	16,270	$	15,112	$	14,060

1.75% Convertible Notes due 2016

LONG-TERM DEBT

Information about carrying amount and components of interest expense of convertible notes

	March 31,
	2013		2012
Additional paid-in capital	$	51,180	$	51,180
Principal amount of 1.75% Convertible Notes	$	250,000	$	250,000
Unamortized discount of the liability component		39,979		49,291
Net carrying amount of 1.75% Convertible Notes	$	210,021	$	200,709
Carrying amount of debt issuance costs	$	3,821	$	4,979

	Fiscal Year Ended March 31,
	2013		2012
Cash interest expense (coupon interest expense)	$	4,375	$	1,641
Non-cash amortization of discount on 1.75% Convertible Notes		9,312		3,336
Amortization of debt issuance costs		1,158		449
Total interest expense related to 1.75% Convertible Notes	$	14,845	$	5,426