Finance Assets Finance Assets 2 (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Leveraged Leases
Rental receivables	$ 88,942,000		$ 88,942,000		$ 810,306,000
Unguaranteed residual values	13,816,000		13,816,000		13,784,000
Principal and interest on non-recourse loans	(61,497,000)		(61,497,000)		(606,708,000)
Unearned income	(8,536,000)		(8,536,000)		(79,111,000)
Investment in leveraged leases	32,725,000		32,725,000		138,271,000
Less: Deferred taxes related to leveraged leases	(20,117,000)		(20,117,000)		(101,255,000)
Net investment in leveraged leases	12,608,000		12,608,000		37,016,000
Leveraged Leases Income Statement Net Income From Leveraged Leases Abstract
Pre-tax leveraged lease income	432,000	1,558,000	1,225,000	3,094,000
Income tax effect	7,000	(81,000)	26,000	(163,000)
Income from leveraged leases	439,000	1,477,000	1,251,000	2,931,000
Leverage Lease Investment Book Value Sold	109,000,000		109,000,000
Gain on sale of leveraged lease assets, net of tax	$ 13,000,000		$ 12,886,000	$ 0