Condensed Consolidated Statements of Operations Parenthetical (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Depreciation:
Net gain on sale of real and personal property	$ (33,557)	$ (22,496)	$ (20,888)
Related party:
Related party revenues, net of eliminations	36,931	38,135	48,061
Related party, costs and expenses, net of eliminations	$ 52,552	$ 46,461	$ 44,120