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Condensed Consolidated Statements of Operations Parenthetical (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Depreciation:    
Net of (gains) losses on sale of real and personal property $ (11,565) $ (7,516)
Related party:    
Related party revenues, net of eliminations 8,417 8,681
Related party, costs and expenses, net of eliminations $ 13,970 $ 12,290