Notes Receivables (Details) (USD $)	Jun. 30, 2011	Dec. 31, 2010
Components of notes receivable
Loan receivable	$ 93,100,000	$ 103,700,000
Other notes	2,900,000	2,800,000
Tax Increment Financing Bonds	6,200,000	13,800,000
Notes receivable, net	102,196,000	120,330,000
Chemung County Industrial Development Agency [Member]
Components of notes receivable
Tax Increment Financing Bonds	2,000,000	2,000,000
City of Merriam Kansas [Member]
Components of notes receivable
Tax Increment Financing Bonds	1,000,000	2,300,000
City of St Louis Missouri [Member]
Components of notes receivable
Tax Increment Financing Bonds	3,200,000	3,200,000
Town of Plainville, Connecticut [Member]
Components of notes receivable
Tax Increment Financing Bonds	$ 0	$ 6,300,000