Investment In Hector Communications Corporation (Summary Of Financial Information Of HCC) (Details) (USD $)				12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 HCC Investment [Member]	Dec. 31, 2011 HCC Investment [Member]
Assets, Current	$ 8,630,124	$ 7,128,468		$ 3,065,977	$ 2,909,247
Noncurrent Assets				120,762,774	124,470,505
Liabilities, Current	8,635,071	7,360,715		44,210,503	7,901,230
Liabilities, Noncurrent	21,748,157	16,836,701		13,565,175	55,624,937
Stockholders' Equity Attributable to Parent	55,730,626	53,683,921	52,445,769	66,053,073	63,853,585
Operating Revenues				26,682,461	26,994,244
Operating Income				4,101,617	5,388,604
Net Income				$ 2,311,618	$ 2,069,395