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DEBT (Tables)
6 Months Ended
Sep. 30, 2014
DEBT  
Information related to availability on Credit Agreement

                                                                                                                                                                                    

 

 

September 30,
2014

 

March 31,
2014

 

Available borrowings

 

$

98,335 

 

$

63,630 

 

Outstanding letters of credit

 

 

1,664 

 

 

1,664 

 

 

4.375% convertible notes due 2014 ("4.375% Convertible Notes")
 
LONG-TERM DEBT  
Schedule of components of interest expense related to convertible notes

                                                                                                                                                                                    

 

 

Three Months
Ended
September 30,

 

Six Months
Ended
September 30,

 

 

 

2013

 

2013

 

Cash interest expense (coupon interest expense)

 

$

1,007 

 

$

2,516 

 

Non-cash amortization of discount on 4.375% Convertible Notes

 

 

1,771 

 

 

4,358 

 

Amortization of debt issuance costs

 

 

113 

 

 

284 

 

 

 

 

 

 

 

Total interest expense related to 4.375% Convertible Notes

 

$

2,891 

 

$

7,158 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.75% Convertible Notes due 2016
 
LONG-TERM DEBT  
Schedule of additional information related to convertible notes

                                                                                                                                                                                    

 

 

September 30, 2014

 

March 31, 2014

 

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

 

 

24,794 

 

 

30,025 

 

 

 

 

 

 

 

Net carrying amount of 1.75% Convertible Notes

 

$

225,206 

 

$

219,975 

 

 

 

 

 

 

 

Carrying amount of debt issuance costs

 

$

2,183 

 

$

2,716 

 

 

 

 

 

 

 

 

Schedule of components of interest expense related to convertible notes

                                                                                                                                                                                    

 

 

Three Months
Ended
September 30,

 

Six Months Ended
September 30,

 

 

 

2014

 

2013

 

2014

 

2013

 

Cash interest expense (coupon interest expense)

 

$

1,094 

 

$

1,094 

 

$

2,188 

 

$

2,188 

 

Non-cash amortization of discount on 1.75% Convertible Notes

 

 

2,637 

 

 

2,467 

 

 

5,231 

 

 

4,894 

 

Amortization of debt issuance costs

 

 

265 

 

 

278 

 

 

533 

 

 

559 

 

 

 

 

 

 

 

 

 

 

 

Total interest expense related to 1.75% Convertible Notes

 

$

3,996 

 

$

3,839 

 

$

7,952 

 

$

7,641 

 

 

1.00% Convertible Notes due 2018
 
LONG-TERM DEBT  
Schedule of additional information related to convertible notes

                                                                                                                                                                                    

 

 

September 30,
2014

 

March 31,
2014

 

Additional paid-in capital

 

$

35,784 

 

$

35,784 

 

 

 

 

 

 

 

Principal amount of 1.00% Convertible Notes

 

$

287,500 

 

$

287,500 

 

Unamortized discount of the liability component

 

 

47,835 

 

 

53,444 

 

 

 

 

 

 

 

Net carrying amount of 1.00% Convertible Notes

 

$

239,665 

 

$

234,056 

 

 

 

 

 

 

 

Carrying amount of debt issuance costs

 

$

1,595 

 

$

1,831 

 

 

 

 

 

 

 

 

Schedule of components of interest expense related to convertible notes

                                                                                                                                                                                    

 

 

Three Months
Ended
September 30,

 

Six Months Ended
September 30,

 

 

 

2014

 

2013

 

2014

 

2013

 

Cash interest expense (coupon interest expense)

 

$

718 

 

$

732 

 

$

1,437 

 

$

823 

 

Non-cash amortization of discount on 1.00% Convertible Notes

 

 

2,826 

 

 

2,712 

 

 

5,609 

 

 

3,044 

 

Amortization of debt issuance costs

 

 

117 

 

 

125 

 

 

236 

 

 

137 

 

 

 

 

 

 

 

 

 

 

 

Total interest expense related to 1.00% Convertible Notes

 

$

3,661 

 

$

3,569 

 

$

7,282 

 

$

4,004