Allowance for Loan Losses Schedule of Credit Losses Related to Covered Financing Receivables, Current Period (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for Loan and Lease Losses	$ 8,966	$ 15,253	$ 17,214	$ 29,790
Covered impaired loan
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of the period	41,514	49,970	40,496	44,027
Provision for Loan Losses Before Benefit Attributable to FDIC Loss Share Agreements	928	(451)	5,153	7,428
Benefit Attributable to FDIC Loss Share Agreements	(1,819)	3,897	(6,046)	(927)
Provision for Loan and Lease Losses	(891)	3,446	(893)	6,501
Increase in Indemnification Asset	1,819	(3,897)	6,046	927
Allowance for Loan and Lease Losses, Write-offs	(815)	(4,410)	(4,022)	(6,346)
Balance at end of the period	$ 41,627	$ 45,109	$ 41,627	$ 45,109