Loans (Changes In FDIC Loss-Share Receivable) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Loans [Abstract]
Balance, beginning of the period	$ 74,390	$ 89,359
Discount accretion of the present value at the acquisition dates	81	146
Effect of additional cash flows on covered loans (prospective recognition)	(1,637)	(2,518)
Increase due to impairment on covered loans		17,679
Other reimbursable expenses	1,466	928
Reimbursements from the FDIC	(4,372)	(14,952)
Balance, end of the period	$ 69,928	$ 90,642