Condensed Consolidated Statements of Operations Parenthetical (USD $)	3 Months Ended		9 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011	Dec. 31, 2010
Depreciation:
Net of (gains) on sale of real and personal property	$ (699,000)	$ (1,655,000)	$ (18,326,000)	$ (18,964,000)
Related Party
Related party revenues, net of eliminations	11,600,000	11,300,000	33,500,000	32,800,000
Related party, costs and expenses, net of eliminations	$ 11,000,000	$ 8,800,000	$ 34,900,000	$ 31,500,000