Finance Receivables (Details 1) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Finance Receivables [Abstract]
Net investments in direct financing leases	$ 474,277	$ 462,505
Notes Receivable	70,000	70,000
Internally Assigned Grade1
Finance Receivables [Abstract]
Number Of DFL Tenants	1	1
Number of Obligors	1	1
Net investments in direct financing leases	2,235	2,225
Notes Receivable	30,000	30,000
Internally Assigned Grade2
Finance Receivables [Abstract]
Number Of DFL Tenants	2	3
Number of Obligors	1	1
Net investments in direct financing leases	60,333	85,857
Notes Receivable	40,000	40,000
Internally Assigned Grade3
Finance Receivables [Abstract]
Number Of DFL Tenants	8	6
Number of Obligors		0
Net investments in direct financing leases	411,709	374,423
Notes Receivable	0	0
Internally Assigned Grade4
Finance Receivables [Abstract]
Number Of DFL Tenants	0	0
Number of Obligors		0
Net investments in direct financing leases	0	0
Notes Receivable	0	0
Internally Assigned Grade5
Finance Receivables [Abstract]
Number Of DFL Tenants	0	0
Number of Obligors		0
Net investments in direct financing leases	0	0
Notes Receivable	$ 0	$ 0