Finance Receivables (Details 2) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014 tenant	Dec. 31, 2013
Credit Quality Of Finance Receivables
Number of tenants	215
Net investments in direct financing leases	$ 838,475	$ 363,420
Notes receivable	20,983	0
Internally Assigned Grade 1
Credit Quality Of Finance Receivables
Number of tenants	3	3
Net investments in direct financing leases	79,388	42,812
Number of obligors	0	0
Notes receivable	0	0
Internally Assigned Grade 2
Credit Quality Of Finance Receivables
Number of tenants	3	3
Net investments in direct financing leases	27,496	27,869
Number of obligors	1	0
Notes receivable	10,026	0
Internally Assigned Grade 3
Credit Quality Of Finance Receivables
Number of tenants	21	8
Net investments in direct financing leases	594,344	284,968
Number of obligors	1	0
Notes receivable	10,957	0
Internally Assigned Grade 4
Credit Quality Of Finance Receivables
Number of tenants	7	1
Net investments in direct financing leases	137,247	7,771
Number of obligors	0	0
Notes receivable	0	0
Internally Assigned Grade 5
Credit Quality Of Finance Receivables
Number of tenants	0	0
Net investments in direct financing leases	0	0
Number of obligors	0	0
Notes receivable	$ 0	$ 0