Notes Receivable And Allowance For Losses Past Due Balances Of Mezzanine And Other Notes Receivable (Details) (Notes Receivable, USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Financing Receivable 30-89 days Past Due	$ 619	$ 0
Financing Receivable >90 days Past Due	9,676	9,773
Financing Receivable Total Past Due	10,295	9,773
Financing Receivable, Current	33,538	12,119
Total Receivables	43,833	21,892
Senior Notes
Financing Receivable 30-89 days Past Due	0	0
Financing Receivable >90 days Past Due	0	0
Financing Receivable Total Past Due	0	0
Financing Receivable, Current	27,549	7,900
Total Receivables	27,549	7,900
Senior Subordinated Notes
Financing Receivable 30-89 days Past Due	619	0
Financing Receivable >90 days Past Due	9,629	9,773
Financing Receivable Total Past Due	10,248	9,773
Financing Receivable, Current	4,771	4,219
Total Receivables	15,019	13,992
Unsecured Notes [Member]
Financing Receivable 30-89 days Past Due	0
Financing Receivable >90 days Past Due	47
Financing Receivable Total Past Due	47
Financing Receivable, Current	1,218
Total Receivables	$ 1,265