Restatement of Previously Issued Condensed Consolidated Financial Statements - Adjustments to Condensed Consolidated Cash Flows (Details) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net loss	$ 11,520	$ 3,065	$ (36,196)	$ (28,723)
Changes in operating assets and liabilities, net			(357,391)	(333,890)
Net cash used by operating activities			(345,006)	(315,602)
Increase in cash and cash equivalents			51,381	231
Cash and cash equivalents at beginning of period	$ 195,230	235,009	$ 195,230	235,009	$ 143,849	$ 234,778
Inventory Adjustments [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net loss		1,008		(19,855)
Changes in operating assets and liabilities, net				19,855
Net cash used by operating activities				0
Increase in cash and cash equivalents				0
Cash and cash equivalents at beginning of period						0
Receivables Adjustments [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net loss		(21)		7,851
Changes in operating assets and liabilities, net				(7,851)
Net cash used by operating activities				0
Increase in cash and cash equivalents				0
Cash and cash equivalents at beginning of period						0
Other Adjustments [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net loss		956		2,639
Changes in operating assets and liabilities, net				(2,675)
Net cash used by operating activities				(36)
Increase in cash and cash equivalents				(36)
Cash and cash equivalents at beginning of period						36
As Reported [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net loss		$ 1,122		(19,358)
Changes in operating assets and liabilities, net				(343,219)
Net cash used by operating activities				(315,566)
Increase in cash and cash equivalents				$ 267
Cash and cash equivalents at beginning of period						$ 234,742