Orange County-Poughkeepsie Limited Partnership (Narrative) (Details) (USD $)	3 Months Ended			12 Months Ended
	Jun. 30, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Scenario, Actual [Member]	Dec. 31, 2011 Scenario, Actual [Member]	Dec. 31, 2012 Scenario, Forecast [Member]	Dec. 31, 2012 Multiplied Value [Member] Scenario, Forecast [Member] item	Dec. 31, 2012 Ownership Percentage [Member] Scenario, Forecast [Member] item
Schedule of Equity Method Investments [Line Items]
Equity interest in O-P		8.108%	8.108%
Annual cash distributions to the Company from the O-P				$ 13,000,000	$ 13,600,000	$ 13,000,000
Aggregate strike price						50,000,000
Equity method investment put option value multiplier times EBITDA							5	0.081081
Equity method investment, amount the investment account was reduced to	$ 0