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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (296,773)	$ (19,603)	$ (563,039)	$ (78,766)
Other comprehensive income (loss):
Unrealized gains (losses) on available for sale securities, net of tax of $0, $0, $0 and $0	(73)	212	207	(467)
Amortization of loss on derivative contract, net of tax of $0, $0, $0 and $0	70	180	213	538
Change in other benefit plan minimum liability, net of tax of $0, $0, $0 and $0				70
Total comprehensive loss	$ (296,776)	$ (19,211)	$ (562,619)	$ (78,625)

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Other Comprehensive Income, Amortization of Loss on Derivative Contract

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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.

+ References

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=51831270

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Amount after tax and reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities. Excludes amounts related to other than temporary impairment (OTTI) loss.

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Amount after tax and reclassification adjustments, of (increase) decrease in accumulated other comprehensive (income) loss related to pension and other postretirement defined benefit plans.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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