Allowance for Loan Losses Schedule of Credit Losses on Financing Receivables, Current Period (Details) (Covered Loans, USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Covered Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of the period	$ 49,970	$ 47,945	$ 44,027	$ 43,255
Provision for Loan Losses Before Benefit Attributable to FDIC Loss Share Agreements	(451)	6,477	7,428	16,154
Benefit Attributable to FDIC Loss Share Agreements	3,897	(2,319)	(927)	(7,858)
Provision for Loan Lease and Other Losses Covered	3,446	4,158	6,501	8,296
Increase in Indemnification Asset	(3,897)	2,319	927	7,858
Allowance for Loan and Lease Losses, Write-offs	(4,410)	(5,353)	(6,346)	(10,340)
Balance at end of the period	$ 45,109	$ 49,069	$ 45,109	$ 49,069