Restatement of Previously Reported Financial Information - Adjustments to Condensed Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2015	Mar. 31, 2015
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total current assets	$ 1,425,923	$ 1,490,358	$ 1,435,873
Total non-current assets		200,315	157,818
Total assets	1,918,698	1,968,198	1,829,018
Non-current liabilities	818,300	1,018,700	995,896
Total equity	241,700	274,672	172,632	$ 194,064
Total liabilities and equity	1,918,698	1,968,198	1,829,018
Retained deficit	$ (177,361)	(145,856)	(237,338)	(211,388)
Accounting Standards Update 2015-03
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total current assets			0
Total non-current assets		(9,875)	(11,272)
Total assets		(9,875)	(11,272)
Non-current liabilities		(9,875)	(11,272)
Total equity			0
Total liabilities and equity		(9,875)	(11,272)
Retained deficit			0	0
As Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total current assets			1,427,269
Total non-current assets		210,190	169,090
Total assets		1,978,073	1,831,686
Non-current liabilities		1,028,575	995,360
Total equity			175,836
Total liabilities and equity		1,978,073	1,831,686
Retained deficit			(234,134)	(208,184)
Restatement Adjustment | Inventory and Tax Adjustments
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total current assets			(3,204)
Total non-current assets		0	0
Total assets		0	(3,204)
Non-current liabilities		0	0
Total equity			(3,204)
Total liabilities and equity		0	(3,204)
Retained deficit			(3,204)	(3,204)
Restatement Adjustment | Reclassifications
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total current assets			11,808
Total non-current assets		0	0
Total assets		0	11,808
Non-current liabilities		0	11,808
Total equity			0
Total liabilities and equity		$ 0	11,808
Retained deficit			$ 0	$ 0