Long-Term Debt (Summary Of Long Term Debt) (Details) (USD $)																0 Months Ended				0 Months Ended					0 Months Ended					0 Months Ended					0 Months Ended						0 Months Ended				0 Months Ended				0 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Nov. 21, 2011	Dec. 31, 2013 Great Western Bank [Member]	Dec. 31, 2013 Great Western Bank [Member] Revolving Credit Facility [Member] Promissory Note Dated December 9, 2011 [Member]	Mar. 25, 2013 Great Western Bank [Member] Revolving Credit Facility [Member] Promissory Note Dated December 9, 2011 [Member]	Dec. 31, 2012 Great Western Bank [Member] Revolving Credit Facility [Member] Promissory Note Dated December 9, 2011 [Member]	Dec. 31, 2013 Great Western Bank [Member] Mortgage Loan Payable [Member] Promissory Note Dated December 9, 2011 [Member]	Mar. 25, 2013 Great Western Bank [Member] Mortgage Loan Payable [Member] Promissory Note Dated December 9, 2011 [Member]	Dec. 31, 2012 Great Western Bank [Member] Mortgage Loan Payable [Member] Promissory Note Dated December 9, 2011 [Member]	Dec. 31, 2013 Great Western Bank [Member] Mortgage Loan Payable [Member] Promissory Note Dated May 5, 2009 [Member]	Mar. 25, 2013 Great Western Bank [Member] Mortgage Loan Payable [Member] Promissory Note Dated May 5, 2009 [Member]	Dec. 31, 2012 Great Western Bank [Member] Mortgage Loan Payable [Member] Promissory Note Dated May 5, 2009 [Member]	Dec. 31, 2013 Citigroup Global Markets Realty Corp [Member] Mortgage Loan Payable [Member] Promissory Note Dated November 7, 2005 [Member]	Dec. 31, 2012 Citigroup Global Markets Realty Corp [Member] Mortgage Loan Payable [Member] Promissory Note Dated November 7, 2005 [Member]	Nov. 10, 2009 GE [Member] Mortgage Loan Payable [Member] Promissory Note Dated December 31, 2007 [Member]	Mar. 17, 2009 GE [Member] Mortgage Loan Payable [Member] Promissory Note Dated December 31, 2007 [Member]	Dec. 31, 2013 GE [Member] Mortgage Loan Payable [Member] Promissory Note Dated December 31, 2007 [Member]	Dec. 31, 2012 GE [Member] Mortgage Loan Payable [Member] Promissory Note Dated December 31, 2007 [Member]	Nov. 10, 2009 GE [Member] Mortgage Loan Payable [Member] Promissory Note Dated August 18, 2006 [Member]	Mar. 17, 2009 GE [Member] Mortgage Loan Payable [Member] Promissory Note Dated August 18, 2006 [Member]	Dec. 31, 2013 GE [Member] Mortgage Loan Payable [Member] Promissory Note Dated August 18, 2006 [Member]	Dec. 31, 2012 GE [Member] Mortgage Loan Payable [Member] Promissory Note Dated August 18, 2006 [Member]	May 01, 2008 GE [Member] Mortgage Loan Payable [Member] Promissory Note Dated August 18, 2006 [Member]	Nov. 10, 2009 GE [Member] Mortgage Loan Payable [Member] Promissory Note Dated January 5, 2007 [Member]	Mar. 17, 2009 GE [Member] Mortgage Loan Payable [Member] Promissory Note Dated January 5, 2007 [Member]	Dec. 31, 2013 GE [Member] Mortgage Loan Payable [Member] Promissory Note Dated January 5, 2007 [Member]	Dec. 31, 2012 GE [Member] Mortgage Loan Payable [Member] Promissory Note Dated January 5, 2007 [Member]	May 01, 2008 GE [Member] Mortgage Loan Payable [Member] Promissory Note Dated January 5, 2007 [Member]	Nov. 10, 2009 GE [Member] Mortgage Loan Payable [Member] Promissory Note Dated February 6, 2007 [Member]	Mar. 17, 2009 GE [Member] Mortgage Loan Payable [Member] Promissory Note Dated February 6, 2007 [Member]	Dec. 31, 2013 GE [Member] Mortgage Loan Payable [Member] Promissory Note Dated February 6, 2007 [Member]	Dec. 31, 2012 GE [Member] Mortgage Loan Payable [Member] Promissory Note Dated February 6, 2007 [Member]	May 01, 2008 GE [Member] Mortgage Loan Payable [Member] Promissory Note Dated February 6, 2007 [Member]	Nov. 10, 2009 GE [Member] Mortgage Loan Payable [Member] Promissory Note Dated May 16, 2007 [Member]	Mar. 17, 2009 GE [Member] Mortgage Loan Payable [Member] Promissory Note Dated May 16, 2007 [Member]	Dec. 31, 2013 GE [Member] Mortgage Loan Payable [Member] Promissory Note Dated May 16, 2007 [Member]	Dec. 31, 2012 GE [Member] Mortgage Loan Payable [Member] Promissory Note Dated May 16, 2007 [Member]	Dec. 31, 2011 GE [Member] Mortgage Loan Payable [Member] Promissory Note Dated May 16, 2007 [Member]	May 01, 2008 GE [Member] Mortgage Loan Payable [Member] Promissory Note Dated May 16, 2007 [Member]	Nov. 10, 2009 GE [Member] Mortgage Loan Payable [Member] Promissory Note One Dated January 2, 2008 [Member]	Mar. 17, 2009 GE [Member] Mortgage Loan Payable [Member] Promissory Note One Dated January 2, 2008 [Member]	Dec. 31, 2013 GE [Member] Mortgage Loan Payable [Member] Promissory Note One Dated January 2, 2008 [Member]	Dec. 31, 2012 GE [Member] Mortgage Loan Payable [Member] Promissory Note One Dated January 2, 2008 [Member]	Nov. 10, 2009 GE [Member] Mortgage Loan Payable [Member] Promissory Note Two Dated January 2, 2008 [Member]	Mar. 17, 2009 GE [Member] Mortgage Loan Payable [Member] Promissory Note Two Dated January 2, 2008 [Member]	Dec. 31, 2013 GE [Member] Mortgage Loan Payable [Member] Promissory Note Two Dated January 2, 2008 [Member]	Dec. 31, 2012 GE [Member] Mortgage Loan Payable [Member] Promissory Note Two Dated January 2, 2008 [Member]	Nov. 10, 2009 GE [Member] Mortgage Loan Payable [Member] Promissory Note Dated January 31, 2008 [Member]	Mar. 17, 2009 GE [Member] Mortgage Loan Payable [Member] Promissory Note Dated January 31, 2008 [Member]	Dec. 31, 2013 GE [Member] Mortgage Loan Payable [Member] Promissory Note Dated January 31, 2008 [Member]	Dec. 31, 2012 GE [Member] Mortgage Loan Payable [Member] Promissory Note Dated January 31, 2008 [Member]	Jan. 31, 2008 GE [Member] Mortgage Loan Payable [Member] Promissory Note Dated January 31, 2008 [Member]	Dec. 31, 2013 Wachovia Bank [Member] Mortgage Loan Payable [Member] Promissory Note One Dated February 4, 1998 [Member]	Dec. 31, 2012 Wachovia Bank [Member] Mortgage Loan Payable [Member] Promissory Note One Dated February 4, 1998 [Member]	Apr. 04, 2007 Wachovia Bank [Member] Mortgage Loan Payable [Member] Promissory Note One Dated February 4, 1998 [Member]	Dec. 31, 2013 Wachovia Bank [Member] Mortgage Loan Payable [Member] Promissory Note Two Dated February 4, 1998 [Member]	Dec. 31, 2012 Wachovia Bank [Member] Mortgage Loan Payable [Member] Promissory Note Two Dated February 4, 1998 [Member]	Apr. 04, 2007 Wachovia Bank [Member] Mortgage Loan Payable [Member] Promissory Note Two Dated February 4, 1998 [Member]	Dec. 31, 2013 Wachovia Bank [Member] Mortgage Loan Payable [Member] Promissory Note Three Dated February 4, 1998 [Member]	Dec. 31, 2012 Wachovia Bank [Member] Mortgage Loan Payable [Member] Promissory Note Three Dated February 4, 1998 [Member]	Apr. 04, 2007 Wachovia Bank [Member] Mortgage Loan Payable [Member] Promissory Note Three Dated February 4, 1998 [Member]	Dec. 31, 2013 Wachovia Bank [Member] Mortgage Loan Payable [Member] Promissory Note Four Dated February 4, 1998 [Member]	Dec. 31, 2012 Wachovia Bank [Member] Mortgage Loan Payable [Member] Promissory Note Four Dated February 4, 1998 [Member]	Apr. 04, 2007 Wachovia Bank [Member] Mortgage Loan Payable [Member] Promissory Note Four Dated February 4, 1998 [Member]	Dec. 31, 2013 Elkhorn Valley Bank [Member] Mortgage Loan Payable [Member] Promissory Note Dated June 7, 2011 [Member]	Feb. 21, 2013 Elkhorn Valley Bank [Member] Mortgage Loan Payable [Member] Promissory Note Dated June 7, 2011 [Member]	Dec. 31, 2012 Elkhorn Valley Bank [Member] Mortgage Loan Payable [Member] Promissory Note Dated June 7, 2011 [Member]	Dec. 31, 2013 Elkhorn Valley Bank [Member] Mortgage Loan Payable [Member] Promissory Note Dated October 10, 2012 [Member]	Dec. 31, 2012 Elkhorn Valley Bank [Member] Mortgage Loan Payable [Member] Promissory Note Dated October 10, 2012 [Member]	Dec. 31, 2013 Morgan Stanley Mortgage Capital Holdings, LLC [Member] Mortgage Loan Payable [Member] Promissory Note Dated November 2, 2012 [Member]	Dec. 31, 2012 Morgan Stanley Mortgage Capital Holdings, LLC [Member] Mortgage Loan Payable [Member] Promissory Note Dated November 2, 2012 [Member]	Dec. 31, 2013 Cantor Commercial Real Estate Lending [Member] Mortgage Loan Payable [Member] Promissory Note Dated October 12, 2012 [Member]	Dec. 31, 2012 Cantor Commercial Real Estate Lending [Member] Mortgage Loan Payable [Member] Promissory Note Dated October 12, 2012 [Member]	Dec. 31, 2013 First State Bank [Member] Mortgage Loan Payable [Member] Promissory Note Dated January 10, 2013 [Member]	Dec. 31, 2012 First State Bank [Member] Mortgage Loan Payable [Member] Promissory Note Dated January 10, 2013 [Member]	Dec. 31, 2013 Middle Patent Capital, LLC [Member] Mortgage Loan Payable [Member] Promissory Note Dated December 6, 2013 [Member]	Dec. 06, 2013 Middle Patent Capital, LLC [Member] Mortgage Loan Payable [Member] Promissory Note Dated December 6, 2013 [Member]	Dec. 31, 2012 Middle Patent Capital, LLC [Member] Mortgage Loan Payable [Member] Promissory Note Dated December 6, 2013 [Member]
Debt Instrument [Line Items]
Long-term Debt	$ 118,045,000	$ 132,821,000			$ 11,037,000		$ 2,451,000	$ 7,074,000		$ 7,296,000	$ 1,182,000		$ 6,786,000	$ 12,280,000	$ 12,667,000			$ 4,321,000	$ 4,572,000			$ 15,510,000	$ 15,943,000				$ 11,815,000	$ 12,261,000				$ 1,819,000	$ 3,102,000				$ 0	$ 9,725,000					$ 2,934,000	$ 3,087,000			$ 0	$ 3,977,000			$ 2,122,000	$ 2,235,000		$ 0	$ 1,357,000		$ 0	$ 1,493,000		$ 0	$ 2,270,000		$ 0	$ 2,771,000		$ 2,759,000		$ 2,923,000	$ 0	$ 1,142,000	$ 29,655,000	$ 30,622,000	$ 6,041,000	$ 6,141,000	$ 1,196,000	$ 0	$ 8,300,000		$ 0
Credit facility maximum borrowing capacity				11,000,000	12,500,000
Face amount of note								7,500,000			10,000,000			14,800,000				7,900,000				17,900,000					15,600,000					3,400,000							27,800,000				3,400,000					4,400,000			2,500,000				2,500,000			2,800,000			4,200,000			5,100,000		3,100,000				1,200,000	30,600,000		6,200,000		2,400,000			8,300,000
Remaining principal balance assumed																																																								$ 2,000,000			$ 2,200,000			$ 3,300,000			$ 4,000,000
Interest rate increase																0.5	1.00			0.5	1.00				0.5	1.00				0.5	1.00				0.5	1.00					0.5	1.00			0.5	1.00			0.5	1.00
Stated interest rate			4.50%		4.95%	5.95%		5.00%	6.00%		5.00%	6.00%		5.97%																																									7.375%			7.375%			7.375%			7.375%		5.50%	6.25%			5.50%	5.83%		4.25%		5.50%			12.50%
Interest rate at period end																		3.74%				7.17%					7.17%					7.17%						7.69%					3.74%					3.81%			4.30%
Basis spread on variable rate																		2.00%						1.98%					1.98%					1.98%						1.98%			2.00%					2.00%					2.56%