Fair Value of Financial Instruments (Tables)

6 Months Ended

Sep. 30, 2016

Carrying Amounts and Fair Values of Subordinated Convertible Debentures [Table Text Block]

The following table shows the carrying amounts and fair values of the Company’s senior and junior subordinated convertible debentures as of September 30, 2016 and March 31, 2016 (amounts in thousands). As of September 30, 2016, the carrying amounts of the Company's senior and junior subordinated convertible debentures have been reduced by debt issuance costs of $17.5 million and $2.3 million, respectively. As of March 31, 2016, the carrying amounts of the Company's senior and junior subordinated convertible debentures have been reduced by debt issuance costs of $18.4 million and $2.4 million, respectively.



	September 30, 2016				March 31, 2016
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
1.625% Senior Subordinated Convertible Debentures	$	1,238,731	$	2,216,539	$	1,216,313	$	1,762,088
2.125% Junior Subordinated Convertible Debentures	$	196,868	$	1,484,805	$	193,936	$	1,143,117