Orange County-Poughkeepsie Limited Partnership (Narrative) (Details) (USD $)	3 Months Ended	6 Months Ended	9 Months Ended		12 Months Ended			3 Months Ended	9 Months Ended	0 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Jun. 30, 2012	Sep. 30, 2014 item	Sep. 30, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2014 O-P [Member]	Sep. 30, 2013 O-P [Member]	Apr. 30, 2014 Put Option [Member]	Sep. 30, 2014 Put Option [Member]	Sep. 30, 2014 Put Option [Member]
Option Indexed to Issuer's Equity [Line Items]
Equity interest in O-P	8.108%		8.108%	8.108%
Annual cash distributions to the Company from the O-P					$ 13,000,000	$ 13,000,000	$ 13,600,000
Aggregate strike price			50,000,000
Equity method investment put option value multiplier times EBITDA			0.081081
Proceeds from exercise of stock options										50,000,000
Gain on sale of ownership interest										49,800,000
Equity method investment, amount the investment account was reduced to		0
Income from equity investments	$ 3,250,000		$ 52,373,000	$ 9,750,000				$ 1,880,000	$ 5,541,000		$ 0	$ 2,600,000