Notes Receivable And Allowance For Losses Narrative (Details) (USD $)	3 Months Ended		9 Months Ended			9 Months Ended				3 Months Ended		9 Months Ended			9 Months Ended	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010	Sep. 30, 2011 Minimum [Member] Forgivable Notes Receivable [Member]	Sep. 30, 2011 Maximum [Member] Forgivable Notes Receivable [Member]	Sep. 30, 2011 Non-impaired Loans [Member] Mezzanine & Other Notes Receivable [Member]	Dec. 31, 2010 Non-impaired Loans [Member] Mezzanine & Other Notes Receivable [Member]	Sep. 30, 2011 Forgivable Notes Receivable [Member]	Sep. 30, 2010 Forgivable Notes Receivable [Member]	Sep. 30, 2011 Forgivable Notes Receivable [Member]	Sep. 30, 2010 Forgivable Notes Receivable [Member]	Dec. 31, 2010 Forgivable Notes Receivable [Member]	Sep. 30, 2011 Mezzanine & Other Notes Receivable [Member]	Dec. 31, 2010 Mezzanine & Other Notes Receivable [Member]
Forgivable notes receivable date range, start (years)						3	10
Notes Receivable, Related Parties	$ 27,112,000		$ 27,112,000		$ 26,093,000					$ 7,997,000		$ 7,997,000		$ 7,753,000	$ 19,115,000	$ 18,340,000
Allowance for losses on non-impaired loans	9,582,000		9,582,000		10,026,000			200,000	600,000	800,000		800,000		775,000	8,782,000	9,251,000
Receivables, allowance for doubtful accounts	8,546,000		8,546,000		9,159,000										0	0
Amortization expense	2,073,000	2,078,000	5,976,000	6,470,000						600,000	500,000	1,700,000	1,400,000
Forgivable notes receivable commitment										5,500,000		5,500,000
Commitments to extend in forgivable notes										2,700,000		2,700,000
Face value of notes value deemed impaired															11,900,000	10,800,000
Loan reserves															8,600,000	8,600,000
Impaired loans, carrying value															3,400,000	2,200,000
Interest income on impaired loans, accrual method															0	0
Interest income on impaired loans, cash basis method															$ 0	$ 0