Orange County-Poughkeepsie Limited Partnership (Narrative) (Details) (USD $)	12 Months Ended			0 Months Ended	6 Months Ended
	Dec. 31, 2014 item	Dec. 31, 2013	Dec. 31, 2012	Apr. 30, 2014	Jun. 30, 2014
Option Indexed to Issuer's Equity [Line Items]
Equity interest in O-P	8.108%
Annual cash distributions to the Company from the O-P		$ 13,000,000
Aggregate strike price	50,000,000
Equity method investment put option value multiplier times EBITDA	0.081081
Equity method investment, amount the investment account was reduced to			0
Income from equity investments	52,373,000	13,000,000
O-P [Member]
Option Indexed to Issuer's Equity [Line Items]
Gain on sale of equity method investment				49,800,000
Income from equity investments		7,271,000			2,597,000
Put Option [Member] | O-P [Member]
Option Indexed to Issuer's Equity [Line Items]
Proceeds on sale of ownership interest				$ 50,000,000