Condensed Consolidated Statements of Operations Parenthetical (USD $)	3 Months Ended		6 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Depreciation:
Net of (gains) on sale of real and personal property	$ (7,917,000)	$ (8,921,000)	$ (17,627,000)	$ (17,309,000)
Related Party
Related party revenues, net of eliminations	11,100,000	10,800,000	22,000,000	21,400,000
Related party, costs and expenses, net of eliminations	$ 12,600,000	$ 12,000,000	$ 23,900,000	$ 22,600,000