Orange County-Poughkeepsie Limited Partnership (Summarized O-P Income Statement Information) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2014 USD ($)
Schedule of Equity Method Investments [Line Items]
Company's share	$ 52,373
Orange County-Poughkeepsie Limited Parnership [Member]
Schedule of Equity Method Investments [Line Items]
Net sales	170,746
Cellular service cost	80,051
Operating expenses	44,726
Operating income	45,969
Other income	62
Net income	46,031
Company's share	$ 2,597