Loans and Credit Quality (Details 5) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 11,574,885	$ 4,312,352	$ 4,383,393
Non-PCI nonaccrual loans	88,948	46,774
Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	108,408
NonCovered [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	11,223,506	3,929,556	3,950,636
Non-PCI nonaccrual loans		3,929,556
NonCovered [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income		54,885	33,909
NonCovered [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	5,398,244	2,422,107	2,548,932
NonCovered [Member] | Real Estate Construction [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	283,067	207,779	188,872
NonCovered [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	5,433,787	1,244,785	1,178,923
Nonperforming Financing Receivable [Member] | NonCovered [Member] | Hospitality [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	6,451	6,723
Nonperforming Financing Receivable [Member] | NonCovered [Member] | SBA Loans [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	7,483	2,602
Nonperforming Financing Receivable [Member] | NonCovered [Member] | Real Estate Other Class [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	26,575	18,648
Nonperforming Financing Receivable [Member] | NonCovered [Member] | Residential Real Estate Construction Financing Receivable [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	925	389
Nonperforming Financing Receivable [Member] | NonCovered [Member] | Commercial Real Estate Construction Financing Receivable [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	2,703	2,830
Nonperforming Financing Receivable [Member] | NonCovered [Member] | Collateralized Loan Obligations [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	5,165	9,991
Nonperforming Financing Receivable [Member] | NonCovered [Member] | Unsecured Commercial Member [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	226	458
Nonperforming Financing Receivable [Member] | NonCovered [Member] | Asset Based [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	5,003	1,070
Nonperforming Financing Receivable [Member] | NonCovered [Member] | Cash Flow [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	15,958	0
Nonperforming Financing Receivable [Member] | NonCovered [Member] | Equipment Finance Commercial Financing Receivable [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	12,885	632
Nonperforming Financing Receivable [Member] | NonCovered [Member] | SBA Financing Receivable [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	2,039	3,037
Nonperforming Financing Receivable [Member] | NonCovered [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	3,535	394
Nonperforming Financing Receivable [Member] | NonCovered [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	40,509	27,973
Nonperforming Financing Receivable [Member] | NonCovered [Member] | Real Estate Construction [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	3,628	3,219
Nonperforming Financing Receivable [Member] | NonCovered [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	41,276	15,188
Performing Financing Receivable [Member] | NonCovered [Member]
Financing Receivable, Impaired [Line Items]
Non-PCI nonaccrual loans	11,134,558	3,882,782
Performing Financing Receivable [Member] | NonCovered [Member] | Hospitality [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	512,899	173,830
Performing Financing Receivable [Member] | NonCovered [Member] | SBA Loans [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	344,285	42,564
Performing Financing Receivable [Member] | NonCovered [Member] | Real Estate Other Class [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	4,500,551	2,177,740
Performing Financing Receivable [Member] | NonCovered [Member] | Residential Real Estate Construction Financing Receivable [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	71,961	58,492
Performing Financing Receivable [Member] | NonCovered [Member] | Commercial Real Estate Construction Financing Receivable [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	207,478	146,068
Performing Financing Receivable [Member] | NonCovered [Member] | Collateralized Loan Obligations [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	423,412	576,490
Performing Financing Receivable [Member] | NonCovered [Member] | Unsecured Commercial Member [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	126,813	153,294
Performing Financing Receivable [Member] | NonCovered [Member] | Asset Based [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,589,429	201,358
Performing Financing Receivable [Member] | NonCovered [Member] | Cash Flow [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	2,298,240	0
Performing Financing Receivable [Member] | NonCovered [Member] | Equipment Finance Commercial Financing Receivable [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	915,575	272,851
Performing Financing Receivable [Member] | NonCovered [Member] | SBA Financing Receivable [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	39,042	25,604
Performing Financing Receivable [Member] | NonCovered [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	104,873	54,491
Performing Financing Receivable [Member] | NonCovered [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	5,357,735	2,394,134
Performing Financing Receivable [Member] | NonCovered [Member] | Real Estate Construction [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	279,439	204,560
Performing Financing Receivable [Member] | NonCovered [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	5,392,511	1,229,597
Collateralized Loan Obligations [Member] | NonCovered [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	428,577	586,481
Unsecured Commercial Member [Member] | NonCovered [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	127,039	153,752
Asset Based [Member] | NonCovered [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,594,432	202,428
Cash Flow [Member] | NonCovered [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	2,314,198	0
Equipment Finance Commercial Financing Receivable [Member] | NonCovered [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	928,460	273,483
SBA Financing Receivable [Member] | NonCovered [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	41,081	28,641
Residential Real Estate Construction Financing Receivable [Member] | NonCovered [Member] | Real Estate Construction [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	72,886	58,881
Commercial Real Estate Construction Financing Receivable [Member] | NonCovered [Member] | Real Estate Construction [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	210,181	148,898
Hospitality [Member] | NonCovered [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	519,350	180,553
SBA Loans [Member] | NonCovered [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	351,768	45,166
Real Estate Other Class [Member] | NonCovered [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 4,527,126	$ 2,196,388