Condensed Consolidating Financial Statements (Details 3) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Condensed Financial Statements, Captions [Line Items]
Comprehensive income (loss)	$ (58,013)	$ (86,508)	$ (3,843)
Parent
Condensed Financial Statements, Captions [Line Items]
Comprehensive income (loss)	(62,676)	(85,449)	1,646
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Comprehensive income (loss)	(57,309)	(43,519)	20,641
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Comprehensive income (loss)	35,640	6,706	7,483
Reclassifications and Eliminations
Condensed Financial Statements, Captions [Line Items]
Comprehensive income (loss)	$ 26,332	$ 35,754	$ (33,613)

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Other Comprehensive Income

-URI http://asc.fasb.org/extlink&oid=6519514

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Comprehensive Income

-URI http://asc.fasb.org/extlink&oid=16317811

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

-SubTopic 10

-Section 45

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=28358780&loc=d3e557-108580

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Net Income

-URI http://asc.fasb.org/extlink&oid=6518256

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