Financing Arrangements (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Financing Obligations [Line Items]
Financing obligations	$ 31,444,000	$ 33,114,000
Harborview Financing Obligation [Member]
Financing Obligations [Line Items]
Financing obligations	17,086,000	17,616,000
Equity interest in consolidated affiliate	80.00%
Term of put option right (in years)	1 year
Commencement date of put option term	Sep. 11, 2014
Transaction cost percentage to sell financing obligation	3.00%
Initial financing obligation	12,700,000
Gross financing obligation increased for net income (in hundredths)	80.00%
Date through which valuation allowance is amortized	September 2014
Put option fair value	6,200,000	10,200,000
Tax Increment Financing Obligation Bond [Member]
Financing Obligations [Line Items]
Financing obligations	13,064,000	14,258,000
Term of period for financing obligation payments	20 years
Expiration date for financing obligation	Oct. 31, 2019
Discount rate of financing obligation	6.93%
Acquisition date of financing obligation	Dec. 01, 2007
Capitalized Ground Lease Obligation [Member]
Financing Obligations [Line Items]
Financing obligations	$ 1,294,000	$ 1,240,000
Expiration date for financing obligation	Oct. 31, 2022
Discount rate of financing obligation	7.10%