Fair Value of Financial Instruments (Tables)

6 Months Ended

Sep. 30, 2015

Fair Value Disclosures [Abstract]

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

The carrying amounts and fair values of the Company’s senior and junior subordinated convertible debentures as of September 30, 2015 and March 31, 2015 are as follows (amounts in thousands):

	September 30, 2015				March 31, 2015
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
1.625% Senior Subordinated Convertible Debentures	$	1,197,792	$	1,637,767	$	1,174,036	$	1,787,531
2.125% Junior Subordinated Convertible Debentures	$	193,630	$	1,000,673	$	190,870	$	1,124,125