Income Taxes - Valuation Allowance (Details) - Valuation Allowance of Deferred Tax Assets - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Dec. 31, 2015	Mar. 31, 2015	Mar. 31, 2014
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at the beginning of the year	$ 8,836	$ 2,771	$ 3,849
Additions, charged to expense	4,655	84	123
Additions, due to the Merger	0	6,974	0
Deductions	(301)	(993)	(1,201)
Balance at the end of the year	$ 13,190	$ 8,836	$ 2,771