Loan and Lease Finance Receivables and Allowance for Credit Losses (Details 3) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Allowance for credit losses and recorded investment in financing receivables
Beginning balance	$ 105,259	$ 108,924
Charge-offs	(20,521)	(65,524)
Recoveries	2,158	659
Provision	7,068	61,200
Ending balance	93,964	105,259
Ending balance: Individually evaluated for impairment	2,968	4,059
Ending balance: Collectively evaluated for impairment	90,996	101,200
Finance receivables ending balance	3,481,991	3,753,224
Ending balance: Individually evaluated for impairment	184,971	184,517
Ending balance: Collectively evaluated for impairment	3,297,020	3,568,707
Covered Loans [Member]
Allowance for credit losses and recorded investment in financing receivables
Beginning balance	0	0
Charge-offs	(893)	(385)
Recoveries	0	15
Provision	893	370
Ending balance	0	0
Ending balance: Individually evaluated for impairment	0	0
Ending balance: Collectively evaluated for impairment	0	0
Finance receivables ending balance	256,869	374,012
Ending balance: Individually evaluated for impairment	83,745	15,879
Ending balance: Collectively evaluated for impairment	173,124	358,133
Commercial and Industrial [Member]
Allowance for credit losses and recorded investment in financing receivables
Beginning balance	11,472	7,530
Charge-offs	(1,980)	(6,290)
Recoveries	302	242
Provision	860	9,990
Ending balance	10,654	11,472
Ending balance: Individually evaluated for impairment	165	50
Ending balance: Collectively evaluated for impairment	10,489	11,422
Finance receivables ending balance	494,299	460,399
Ending balance: Individually evaluated for impairment	4,954	9,404
Ending balance: Collectively evaluated for impairment	489,345	450,995
Construction [Member]
Allowance for credit losses and recorded investment in financing receivables
Beginning balance	10,188	21,222
Charge-offs	(7,976)	(15,648)
Recoveries	757	291
Provision	1,978	4,323
Ending balance	4,947	10,188
Ending balance: Individually evaluated for impairment	0	3,300
Ending balance: Collectively evaluated for impairment	4,947	6,888
Finance receivables ending balance	76,146	138,980
Ending balance: Individually evaluated for impairment	33,402	63,025
Ending balance: Collectively evaluated for impairment	42,744	75,955
Real Estate [Member]
Allowance for credit losses and recorded investment in financing receivables
Beginning balance	43,529	42,215
Charge-offs	(5,870)	(41,356)
Recoveries	748	35
Provision	13,466	42,635
Ending balance	51,873	43,529
Ending balance: Individually evaluated for impairment	1,339	681
Ending balance: Collectively evaluated for impairment	50,534	42,848
Finance receivables ending balance	2,124,734	2,198,723
Ending balance: Individually evaluated for impairment	52,141	90,416
Ending balance: Collectively evaluated for impairment	2,072,593	2,108,307
Municipal Lease Finance Receivables [Member]
Allowance for credit losses and recorded investment in financing receivables
Beginning balance	2,172	1,724
Charge-offs	0	(13)
Recoveries	0
Provision	231	461
Ending balance	2,403	2,172
Ending balance: Individually evaluated for impairment	0	0
Ending balance: Collectively evaluated for impairment	2,403	2,172
Finance receivables ending balance	113,460	128,552
Ending balance: Individually evaluated for impairment	0	0
Ending balance: Collectively evaluated for impairment	113,460	128,552
Dairy and Livestock [Member]
Allowance for credit losses and recorded investment in financing receivables
Beginning balance	36,061	31,051
Charge-offs	(3,291)	(1,205)
Recoveries	151
Provision	(15,691)	6,215
Ending balance	17,230	36,061
Ending balance: Individually evaluated for impairment	1,371	0
Ending balance: Collectively evaluated for impairment	15,859	36,061
Finance receivables ending balance	343,350	377,829
Ending balance: Individually evaluated for impairment	10,251	5,207
Ending balance: Collectively evaluated for impairment	333,099	372,622
Consumer, Auto and Other [Member]
Allowance for credit losses and recorded investment in financing receivables
Beginning balance	1,034	1,004
Charge-offs	(511)	(627)
Recoveries	200	76
Provision	915	581
Ending balance	1,638	1,034
Ending balance: Individually evaluated for impairment	93	28
Ending balance: Collectively evaluated for impairment	1,545	1,006
Finance receivables ending balance	73,133	74,729
Ending balance: Individually evaluated for impairment	478	586
Ending balance: Collectively evaluated for impairment	72,655	74,143
Unallocated [Member]
Allowance for credit losses and recorded investment in financing receivables
Beginning balance	803	4,178
Recoveries	0
Provision	4,416	(3,375)
Ending balance	5,219	803
Ending balance: Individually evaluated for impairment	0	0
Ending balance: Collectively evaluated for impairment	5,219	803
Finance receivables ending balance	0	0
Ending balance: Individually evaluated for impairment	0	0
Ending balance: Collectively evaluated for impairment	$ 0	$ 0