Loans (Changes in Loss Share Receivable Associated with Covered Loans Table) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Acquired Impaired Loans
Changes in Loss Share Receivable Associated with Covered Loans [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications from Nonaccretable Difference	$ 45,824	$ 46,361
Loss Share Receivable
Changes in Loss Share Receivable Associated with Covered Loans [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield		61,827	113,734
Changes in Loss Share Receivable [Roll Forward]
Amortization	(20,943)	(24,307)
Increase due to impairment on covered loans	2,920	10,790
FDIC reimbursement	(17,837)	(27,234)
Covered loans paid in full	(3,934)	(11,156)
Balance at end of period	$ 22,033	$ 61,827