Loans and Leases (Details 3) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	$ 11,882,432	$ 4,312,352
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	101,483
NonCovered [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Impaired Financing Receivable, Related Allowance	10,774	7,600
Financing Receivable, Individually Evaluated for Impairment	10,774	7,600
Loans held for investment, net	11,591,641	3,929,556	[1]
NonCovered [Member] | Hospitality [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Impaired Financing Receivable, Related Allowance	47	198
NonCovered [Member] | SBA Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Impaired Financing Receivable, Related Allowance	0	230
NonCovered [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Impaired Financing Receivable, Related Allowance		2,188
Financing Receivable, Individually Evaluated for Impairment	693	2,188
Loans held for investment, net	5,340,560	2,422,107	[1]
NonCovered [Member] | Residential Real Estate Construction Financing Receivable [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Impaired Financing Receivable, Related Allowance	46	168
NonCovered [Member] | Real Estate Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Impaired Financing Receivable, Related Allowance		169
Financing Receivable, Individually Evaluated for Impairment	69	169
Loans held for investment, net	307,135	207,779	[1]
NonCovered [Member] | Collateralized Loan Obligations [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Impaired Financing Receivable, Related Allowance	3,771	4,270
NonCovered [Member] | Unsecured Commercial Member [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Impaired Financing Receivable, Related Allowance	799	375
NonCovered [Member] | Asset Based [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Impaired Financing Receivable, Related Allowance	137	180
NonCovered [Member] | Cash Flow [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Impaired Financing Receivable, Related Allowance	2,667	0
NonCovered [Member] | Equipment Finance Commercial Financing Receivable [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Impaired Financing Receivable, Related Allowance	2,601	0
NonCovered [Member] | SBA Financing Receivable [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Impaired Financing Receivable, Related Allowance	0	178
NonCovered [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Impaired Financing Receivable, Related Allowance		5,003
Financing Receivable, Individually Evaluated for Impairment	9,975	5,003
Loans held for investment, net	5,842,463	1,244,785	[1]
NonCovered [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Impaired Financing Receivable, Related Allowance	37	240
Financing Receivable, Individually Evaluated for Impairment	37	240
Loans held for investment, net		54,885	[1]
NonCovered [Member] | Nonclassified [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	11,349,030	3,802,245
NonCovered [Member] | Nonclassified [Member] | Hospitality [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	542,458	168,216
NonCovered [Member] | Nonclassified [Member] | SBA Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	364,786	39,869
NonCovered [Member] | Nonclassified [Member] | Real Estate Other Class [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	4,336,330	2,132,109
NonCovered [Member] | Nonclassified [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	5,243,574	2,340,194
NonCovered [Member] | Nonclassified [Member] | Residential Real Estate Construction Financing Receivable [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	96,326	58,131
NonCovered [Member] | Nonclassified [Member] | Commercial Real Estate Construction Financing Receivable [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	207,061	142,607
NonCovered [Member] | Nonclassified [Member] | Real Estate Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	303,387	200,738
NonCovered [Member] | Nonclassified [Member] | Collateralized Loan Obligations [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	416,754	567,643
NonCovered [Member] | Nonclassified [Member] | Unsecured Commercial Member [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	130,501	151,896
NonCovered [Member] | Nonclassified [Member] | Asset Based [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	1,783,304	195,569
NonCovered [Member] | Nonclassified [Member] | Cash Flow [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	2,376,530	0
NonCovered [Member] | Nonclassified [Member] | Equipment Finance Commercial Financing Receivable [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	953,516	272,851
NonCovered [Member] | Nonclassified [Member] | SBA Financing Receivable [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	44,054	22,880
NonCovered [Member] | Nonclassified [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	5,704,659	1,210,839
NonCovered [Member] | Nonclassified [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	97,410	50,474
NonCovered [Member] | Classified [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	242,611	127,311
NonCovered [Member] | Classified [Member] | Hospitality [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	17,761	12,337
NonCovered [Member] | Classified [Member] | SBA Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	11,141	5,297
NonCovered [Member] | Classified [Member] | Real Estate Other Class [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	68,084	64,279
NonCovered [Member] | Classified [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	96,986	81,913
NonCovered [Member] | Classified [Member] | Residential Real Estate Construction Financing Receivable [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	402	750
NonCovered [Member] | Classified [Member] | Commercial Real Estate Construction Financing Receivable [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	3,346	6,291
NonCovered [Member] | Classified [Member] | Real Estate Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	3,748	7,041
NonCovered [Member] | Classified [Member] | Collateralized Loan Obligations [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	22,433	18,838
NonCovered [Member] | Classified [Member] | Unsecured Commercial Member [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	1,323	1,856
NonCovered [Member] | Classified [Member] | Asset Based [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	11,547	6,859
NonCovered [Member] | Classified [Member] | Cash Flow [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	83,321	0
NonCovered [Member] | Classified [Member] | Equipment Finance Commercial Financing Receivable [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	15,973	632
NonCovered [Member] | Classified [Member] | SBA Financing Receivable [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	3,207	5,761
NonCovered [Member] | Classified [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	137,804	33,946
NonCovered [Member] | Classified [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	4,073	4,411
Purchased Credit Impaired Loans and Leases [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	290,791	382,796	[1]
Purchased Credit Impaired Loans and Leases [Member] | Covered [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	100,400	362,500
Unsecured Commercial Member [Member] | NonCovered [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	131,824	153,752
Asset Based [Member] | NonCovered [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	1,794,851	202,428
Cash Flow [Member] | NonCovered [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	2,459,851	0
Equipment Finance Commercial Financing Receivable [Member] | NonCovered [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	969,489	273,483
SBA Financing Receivable [Member] | NonCovered [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	47,261	28,641
Residential Real Estate Construction Financing Receivable [Member] | NonCovered [Member] | Real Estate Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	96,728	58,881
Commercial Real Estate Construction Financing Receivable [Member] | NonCovered [Member] | Real Estate Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	210,407	148,898
Hospitality [Member] | NonCovered [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	560,219	180,553
SBA Loans [Member] | NonCovered [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	375,927	45,166
Real Estate Other Class [Member] | NonCovered [Member] | Mortgage Loans on Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment, net	$ 4,404,414	$ 2,196,388

[1] (1)As of December 31, 2013, the amounts of loans covered by loss sharing provisions of FDIC loss sharing agreements in the Non-PCI and PCI categories were $85.9 million and $362.5 million.