Finance Receivables (Details 1) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Credit Quality Of Finanace Receivables:
Net investments in direct financing leases	$ 478,346	$ 475,872
Note receivable	40,000	40,000
Internally Assigned Grade1 [Member]
Credit Quality Of Finanace Receivables:
Number Of DFL tenants	1	1
Number of obligors
Net investments in direct financing leases	2,247	2,239
Note receivable	0	0
Internally Assigned Grade2 [Member]
Credit Quality Of Finanace Receivables:
Number Of DFL tenants	0	2
Number of obligors
Net investments in direct financing leases	0	60,218
Note receivable	0	0
Internally Assigned Grade3 [Member]
Credit Quality Of Finanace Receivables:
Number Of DFL tenants	7	8
Number of obligors	1	1
Net investments in direct financing leases	389,402	413,415
Note receivable	40,000	40,000
Internally Assigned Grade4 [Member]
Credit Quality Of Finanace Receivables:
Number Of DFL tenants	3	0
Number of obligors
Net investments in direct financing leases	86,697	0
Note receivable	0	0
Internally Assigned Grade5 [Member]
Credit Quality Of Finanace Receivables:
Number Of DFL tenants	0	0
Number of obligors
Net investments in direct financing leases	0	0
Note receivable	$ 0	$ 0