Loans and Leases (Details 4) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 12,452,205	$ 11,882,432
Non-PCI nonaccrual loans	107,190	83,621
NonCovered [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	12,258,916	11,591,641	$ 11,223,506
Financing Receivable, Recorded Investment, Nonaccrual Status	107,190	83,621
Non-PCI nonaccrual loans		11,591,641
NonCovered [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	129,821	101,483	108,408
Financing Receivable, Recorded Investment, Nonaccrual Status	3,379	3,485
NonCovered [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	5,505,087	5,340,560	5,398,244
Financing Receivable, Recorded Investment, Nonaccrual Status	31,821	37,612
NonCovered [Member] | Real Estate Construction [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	372,480	307,135	283,067
Financing Receivable, Recorded Investment, Nonaccrual Status	374	1,559
NonCovered [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	6,251,528	5,842,463	$ 5,433,787
Financing Receivable, Recorded Investment, Nonaccrual Status	71,616	40,965
Nonperforming Financing Receivable [Member] | NonCovered [Member] | Hospitality [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,845	6,366
Nonperforming Financing Receivable [Member] | NonCovered [Member] | SBA Loans [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	11,682	11,141
Nonperforming Financing Receivable [Member] | NonCovered [Member] | Real Estate Other Class [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	18,294	20,105
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	374	381
Nonperforming Financing Receivable [Member] | NonCovered [Member] | Commercial Real Estate Construction Loan Receivable [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	1,178
Nonperforming Financing Receivable [Member] | NonCovered [Member] | Collateralized Loan Obligations [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	2,771	5,450
Nonperforming Financing Receivable [Member] | NonCovered [Member] | Unsecured Commercial Member [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	923	639
Nonperforming Financing Receivable [Member] | NonCovered [Member] | Asset Based [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	90	4,574
Nonperforming Financing Receivable [Member] | NonCovered [Member] | Cash Flow [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	11,761	15,964
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	53,153	11,131
Nonperforming Financing Receivable [Member] | NonCovered [Member] | SBA Financing Receivable [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	2,918	3,207
Nonperforming Financing Receivable [Member] | NonCovered [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income		3,485
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		37,612
Nonperforming Financing Receivable [Member] | NonCovered [Member] | Real Estate Construction [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income		1,559
Nonperforming Financing Receivable [Member] | NonCovered [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income		40,965
Performing Financing Receivable [Member] | NonCovered [Member]
Financing Receivable, Impaired [Line Items]
Non-PCI nonaccrual loans	12,151,726	11,508,020
Performing Financing Receivable [Member] | NonCovered [Member] | Hospitality [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	622,302	553,853
Performing Financing Receivable [Member] | NonCovered [Member] | SBA Loans [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	387,044	364,786
Performing Financing Receivable [Member] | NonCovered [Member] | Real Estate Other Class [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	4,463,920	4,384,309
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	144,867	96,347
Performing Financing Receivable [Member] | NonCovered [Member] | Commercial Real Estate Construction Loan Receivable [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	227,239	209,229
Performing Financing Receivable [Member] | NonCovered [Member] | Collateralized Loan Obligations [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	356,318	433,737
Performing Financing Receivable [Member] | NonCovered [Member] | Unsecured Commercial Member [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	125,648	131,185
Performing Financing Receivable [Member] | NonCovered [Member] | Asset Based [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	2,022,339	1,790,277
Performing Financing Receivable [Member] | NonCovered [Member] | Cash Flow [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	2,788,793	2,443,887
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	841,624	958,358
Performing Financing Receivable [Member] | NonCovered [Member] | SBA Financing Receivable [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	45,190	44,054
Performing Financing Receivable [Member] | NonCovered [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	126,442	97,998
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	5,473,266	5,302,948
Performing Financing Receivable [Member] | NonCovered [Member] | Real Estate Construction [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	372,106	305,576
Performing Financing Receivable [Member] | NonCovered [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	6,179,912	5,801,498
Collateralized Loan Obligations [Member] | NonCovered [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	359,089	439,187
Unsecured Commercial Member [Member] | NonCovered [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	126,571	131,824
Asset Based [Member] | NonCovered [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	2,022,429	1,794,851
Cash Flow [Member] | NonCovered [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	2,800,554	2,459,851
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	894,777	969,489
SBA Financing Receivable [Member] | NonCovered [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	48,108	47,261
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	145,241	96,728
Hospitality [Member] | NonCovered [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	624,147	560,219
SBA Loans [Member] | NonCovered [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Loans and Leases Receivable, Net of Deferred Income	398,726	375,927
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	$ 4,482,214	$ 4,404,414