Condensed Consolidated Statements of Operations Parenthetical - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Depreciation:
Net gains on disposal of personal property	$ (11,822)	$ (32,495)	$ (98,158)
Related party:
Related party revenues, net of eliminations	32,928	33,955	32,619
Related party, costs and expenses, net of eliminations	$ 61,279	$ 59,853	$ 57,368