Loan Receivable and Allowance for Loan and Lease Losses (Details 8) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Accretable yield for prior loan acquisitions
Balance, beginning of period	$ 44,703	$ 6,220	$ 45,358	$ 7,176
Accretion to interest income	0	(503)	(2,059)	(1,030)
Balance, end of period	43,230	5,717	43,230	5,717
Reclassification from nonaccretable difference and disposals, net	$ (1,473)	$ 0	$ (69)	$ (429)