Finance Receivables (Details 3) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Credit Quality Of Finanace Receivables:
Net investments in direct financing leases (inclusive of amounts attributable to consolidated VIEs of $242,175 and $240,112, respectively)	$ 475,872	$ 462,505
Notes receivable	40,000	70,000
Internally Assigned Grade1 [Member]
Credit Quality Of Finanace Receivables:
Number Of DFL Tenants	1	1
Number of Obligors		1
Net investments in direct financing leases (inclusive of amounts attributable to consolidated VIEs of $242,175 and $240,112, respectively)	2,239	2,225
Notes receivable	0	30,000
Internally Assigned Grade2 [Member]
Credit Quality Of Finanace Receivables:
Number Of DFL Tenants	2	3
Number of Obligors		1
Net investments in direct financing leases (inclusive of amounts attributable to consolidated VIEs of $242,175 and $240,112, respectively)	60,218	85,857
Notes receivable	0	40,000
Internally Assigned Grade3 [Member]
Credit Quality Of Finanace Receivables:
Number Of DFL Tenants	8	6
Number of Obligors	1
Net investments in direct financing leases (inclusive of amounts attributable to consolidated VIEs of $242,175 and $240,112, respectively)	413,415	374,423
Notes receivable	40,000	0
Internally Assigned Grade4 [Member]
Credit Quality Of Finanace Receivables:
Number Of DFL Tenants
Number of Obligors
Net investments in direct financing leases (inclusive of amounts attributable to consolidated VIEs of $242,175 and $240,112, respectively)	0	0
Notes receivable	0	0
Internally Assigned Grade5 [Member]
Credit Quality Of Finanace Receivables:
Number Of DFL Tenants
Number of Obligors
Net investments in direct financing leases (inclusive of amounts attributable to consolidated VIEs of $242,175 and $240,112, respectively)	0	0
Notes receivable	$ 0	$ 0