Derivative Instruments Gain (Loss) (Details) (Interest Rate Swap [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
Mar. 31, 2015
Interest Rate Swap [Member]
Derivative [Line Items]
Gain (Loss) on Senior Subordinated Convertible Debentures	$ (8,302)
Gain (Loss) on Interest Rate Swap	$ 8,928

Amount of gain (loss) from the increase (decrease) in fair value of derivative and nonderivative instruments designated as fair value hedging instruments recognized in the income statement.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 25

-Section 50

-Paragraph 1

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986

Name:	us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration