Finance Assets Finance Assets 2 (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Leveraged Leases [Line Items]
Rental receivables	$ 89,193,000		$ 89,193,000		$ 810,306,000
Unguaranteed residual values	14,312,000		14,312,000		13,784,000
Principal and interest on non-recourse loans	(60,762,000)		(60,762,000)		(606,708,000)
Unearned income	(8,370,000)		(8,370,000)		(79,111,000)
Investment in leveraged leases	34,373,000		34,373,000		138,271,000
Less: Deferred taxes related to leveraged leases	(20,199,000)		(20,199,000)		(101,255,000)
Net investment in leveraged leases	14,174,000		14,174,000		37,016,000
Leveraged Leases Income Statement Net Income From Leveraged Leases Abstract
Pre-tax leveraged lease income	467,000	1,457,000	1,692,000	4,551,000
Income tax effect	8,000	(641,000)	33,000	(804,000)
Income from leveraged leases	475,000	816,000	1,725,000	3,747,000
Leverage Lease Investment Book Value Sold	109,000,000	109,000,000	109,000,000	109,000,000
Gain on sale of leveraged lease assets, net of tax	$ 13,000,000	$ 27,000,000	$ 12,886,000	$ 26,689,000