Loan and Lease Finance Receivables and Allowance for Credit Losses (Details 1) (USD $) In Thousands, unless otherwise specified	6 Months Ended	9 Months Ended	12 Months Ended
	Jun. 30, 2011	Sep. 30, 2011	Dec. 31, 2011 Non-covered loans held for sale activity [Member]	Dec. 31, 2010 Non-covered loans held for sale activity [Member]	Dec. 31, 2011 Covered loans held for sale activity [Member]	Dec. 31, 2010 Covered loans held for sale activity [Member]	Sep. 30, 2011 Covered loans held for sale activity [Member]
Schedule of activity of loans held for sale
Balance, beginning of period	$ 2,954	$ 2,954	$ 2,954	$ 1,439	$ 0	$ 0	$ 5,700
Originations of mortgage loans			37,304	33,391	0	0
Sales of mortgage loans			(34,962)	(29,212)	0	0
Transfer of mortgage loans to held for investment			(3,292)	(4,320)	0	0
Sales of other loans			(6,000)		0	0
Transfers of other loans to held for sale	6,000		6,000	2,521	5,726
Write-down of loans held for sale		1,700	(1,656)	(865)	0	0
Payment on other loans					(62)
Balance, end of period			$ 348	$ 2,954	$ 5,664	$ 0	$ 5,700