Cleveland Medical Mart Development Project (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Performance Not Achieved Termination Period		5 years
Development and Operating Period	17 years
Development And Project Management Revenues	$ 154,080,000	$ 0	$ 0
Development And Project Management Expenses	145,824,000	0	0
Cleveland Medical Mart & Convention Center [Member]
Square Footage Of Real Estate Property		1,000,000
Construction Costs Budgeted	465,000,000
Annual Net Settled Payments Received	10,000,000
Annual Obligation to the County	36,000,000
Commitments to Fund Improvements		11,500,000
Development And Project Management Revenues	154,080,000
Development And Project Management Expenses	$ 145,824,000