Allowance for Loan Losses Schedule of Credit Losses Related to Covered Financing Receivables, Current Period (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for Loan and Lease Losses	$ 14,275	$ 9,192	$ 31,489	$ 38,982
Covered impaired loan
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of the period	41,627	45,109	40,496	44,027
Provision for Loan Losses Before Benefit Attributable to FDIC Loss Share Agreements	3,986	2,827	9,139	10,255
Benefit Attributable to FDIC Loss Share Agreements	(257)	(2,908)	(6,303)	(3,835)
Provision for Loan and Lease Losses	3,729	(81)	2,836	6,420
Increase in Indemnification Asset	257	2,908	6,303	3,835
Allowance for Loan and Lease Losses, Write-offs	(417)	(4,948)	(4,439)	(11,294)
Balance at end of the period	$ 45,196	$ 42,988	$ 45,196	$ 42,988