Finance Receivables (Details 3) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013 tenant	Dec. 31, 2012
Credit Quality Of Finanace Receivables
Number of tenants	128
Net investments in direct financing leases	$ 363,420	$ 376,005
Internally Assigned Grade 1
Credit Quality Of Finanace Receivables
Number of tenants	3	3
Net investments in direct financing leases	42,812	46,398
Internally Assigned Grade 2
Credit Quality Of Finanace Receivables
Number of tenants	3	4
Net investments in direct financing leases	27,869	49,764
Internally Assigned Grade 3
Credit Quality Of Finanace Receivables
Number of tenants	8	8
Net investments in direct financing leases	284,968	257,281
Internally Assigned Grade 4
Credit Quality Of Finanace Receivables
Number of tenants	1	4
Net investments in direct financing leases	7,771	22,562
Internally Assigned Grade 5
Credit Quality Of Finanace Receivables
Number of tenants	0	0
Net investments in direct financing leases	$ 0	$ 0