Allowance for Loan Losses Allowance for Losses on Lending-Related Commitments and Impaired Loans (Schedule of Aging of the Company's Loan Portfolio) (Details) - USD ($) $ in Thousands		Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual		$ 78,950	$ 77,710
90+ days and still accruing		41,872	37,987
Current		16,993,266	14,408,516
Total loans		17,266,790	14,636,107
Loans, net of unearned income excluding covered loans, Nonaccrual		73,072	70,420
Loans, net of unearned income excluding covered loans, 90+ days past due and still accruing		34,537	20,148
Loans, net of unearned income excluding covered loans, current		16,864,283	14,213,075
Loans, net of unearned income, excluding covered loans		17,118,117	14,409,398
Covered loans, Nonaccrual		5,878	7,290
Covered loans, 90+ days past due and still accruing		7,335	17,839
Covered loans, Current		128,983	195,441
Covered loans		148,673	226,709
Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual		12,712	9,157
90+ days and still accruing		1,433	839
Current		4,666,927	3,897,717
Loans, net of unearned income, excluding covered loans		4,713,909	3,924,394
Commercial | Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual		12,416	9,132
90+ days and still accruing		6	474
Current		2,819,253	2,194,221
Loans, net of unearned income, excluding covered loans		2,851,354	2,214,480
Commercial | Franchise
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual		0	0
90+ days and still accruing		0	0
Current		245,228	250,673
Loans, net of unearned income, excluding covered loans		245,228	252,200
Commercial | Mortgage warehouse lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual		0	0
90+ days and still accruing		0	0
Current		222,806	139,003
Loans, net of unearned income, excluding covered loans		222,806	139,003
Commercial | Community Advanatage - homeowners association
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual		0	0
90+ days and still accruing		0	0
Current		130,986	106,364
Loans, net of unearned income, excluding covered loans		130,986	106,364
Commercial | Aircraft
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual		288	0
90+ days and still accruing		0	0
Current		5,039	8,065
Loans, net of unearned income, excluding covered loans		5,327	8,065
Commercial | Asset-based lending
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual		8	25
90+ days and still accruing		0	0
Current		736,968	802,608
Loans, net of unearned income, excluding covered loans		742,684	806,402
Commercial | Tax exempt
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual		0	0
90+ days and still accruing		0	0
Current		267,273	217,487
Loans, net of unearned income, excluding covered loans		267,273	217,487
Commercial | Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual		0	0
90+ days and still accruing		535	0
Current		220,599	159,744
Loans, net of unearned income, excluding covered loans		226,074	160,136
Commercial | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual		0	0
90+ days and still accruing		0	0
Current		3,588	11,034
Loans, net of unearned income, excluding covered loans		3,588	11,034
Commercial | PCI - commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	[1]	0	0
90+ days and still accruing	[1]	892	365
Current	[1]	15,187	8,518
Loans, net of unearned income, excluding covered loans	[1],[2]	18,589	9,223
Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual		26,645	26,605
90+ days and still accruing		22,111	10,976
Current		5,424,863	4,428,053
Loans, net of unearned income, excluding covered loans		5,529,289	4,505,753
Commercial real estate | Residential construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual		273	0
90+ days and still accruing		0	0
Current		70,063	38,370
Loans, net of unearned income, excluding covered loans		70,381	38,696
Commercial real estate | Commercial construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual		33	230
90+ days and still accruing		0	0
Current		285,275	185,513
Loans, net of unearned income, excluding covered loans		288,279	187,766
Commercial real estate | Land
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual		1,751	2,656
90+ days and still accruing		0	0
Current		76,546	86,779
Loans, net of unearned income, excluding covered loans		78,417	91,830
Commercial real estate | Office
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual		4,619	7,288
90+ days and still accruing		0	0
Current		853,801	694,149
Loans, net of unearned income, excluding covered loans		863,001	705,432
Commercial real estate | Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual		9,564	2,392
90+ days and still accruing		0	0
Current		715,207	617,820
Loans, net of unearned income, excluding covered loans		727,648	623,970
Commercial real estate | Retail
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual		1,760	4,152
90+ days and still accruing		0	0
Current		863,887	723,919
Loans, net of unearned income, excluding covered loans		868,399	731,488
Commercial real estate | Multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual		1,954	249
90+ days and still accruing		0	0
Current		733,230	603,323
Loans, net of unearned income, excluding covered loans		742,349	605,742
Commercial real estate | Mixed use and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual		6,691	9,638
90+ days and still accruing		0	0
Current		1,712,187	1,443,853
Loans, net of unearned income, excluding covered loans		1,732,816	1,465,117
Commercial real estate | PCI - commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	[1]	0	0
90+ days and still accruing	[1]	22,111	10,976
Current	[1]	114,667	34,327
Loans, net of unearned income, excluding covered loans	[1],[2]	157,999	55,712
Home equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual		6,848	6,174
90+ days and still accruing		0	0
Current		770,421	705,623
Loans, net of unearned income, excluding covered loans		784,675	716,293
Residential real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, net of unearned income, excluding covered loans		607,451	483,542
Residential real estate | Residential real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual		12,043	15,502
90+ days and still accruing		0	0
Current		586,154	459,224
Loans, net of unearned income, excluding covered loans		603,985	481,308
Residential real estate | PCI - residential real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	[1]	0	0
90+ days and still accruing	[1]	488	549
Current	[1]	2,697	1,685
Loans, net of unearned income, excluding covered loans	[1],[2]	3,466	2,234
Premium finance receivables | Commercial insurance loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual		14,561	12,705
90+ days and still accruing		10,294	7,665
Current		2,321,786	2,307,140
Loans, net of unearned income, excluding covered loans		2,374,921	2,350,833
Premium finance receivables | Life insurance loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual		0	0
90+ days and still accruing		0	0
Current		2,578,632	1,870,669
Loans, net of unearned income, excluding covered loans		2,593,204	1,884,092
Premium finance receivables | PCI - life insurance loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	[1]	0	0
90+ days and still accruing	[1]	0	0
Current	[1]	368,292	393,479
Loans, net of unearned income, excluding covered loans	[1],[2]	368,292	393,479
Consumer and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual		263	277
90+ days and still accruing		211	119
Current		144,511	149,485
Loans, net of unearned income, excluding covered loans		146,376	151,012
60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		42,806	39,281
Loans, net of unearned income excluding covered loans, 60-89 days past due and still accruing		42,103	37,977
Covered loans, 60-89 days past due and still accruing		703	1,304
60 to 89 Days Past Due | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		11,361	5,123
60 to 89 Days Past Due | Commercial | Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		6,749	3,161
60 to 89 Days Past Due | Commercial | Franchise
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		0	308
60 to 89 Days Past Due | Commercial | Mortgage warehouse lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		0	0
60 to 89 Days Past Due | Commercial | Community Advanatage - homeowners association
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		0	0
60 to 89 Days Past Due | Commercial | Aircraft
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		0	0
60 to 89 Days Past Due | Commercial | Asset-based lending
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		3,864	1,375
60 to 89 Days Past Due | Commercial | Tax exempt
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		0	0
60 to 89 Days Past Due | Commercial | Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		748	77
60 to 89 Days Past Due | Commercial | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		0	0
60 to 89 Days Past Due | Commercial | PCI - commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due	[1]	0	202
60 to 89 Days Past Due | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		16,427	12,232
60 to 89 Days Past Due | Commercial real estate | Residential construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		0	250
60 to 89 Days Past Due | Commercial real estate | Commercial construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		1,371	0
60 to 89 Days Past Due | Commercial real estate | Land
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		0	0
60 to 89 Days Past Due | Commercial real estate | Office
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		764	2,621
60 to 89 Days Past Due | Commercial real estate | Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		1,868	0
60 to 89 Days Past Due | Commercial real estate | Retail
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		442	116
60 to 89 Days Past Due | Commercial real estate | Multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		597	249
60 to 89 Days Past Due | Commercial real estate | Mixed use and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		6,723	2,603
60 to 89 Days Past Due | Commercial real estate | PCI - commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due	[1]	4,662	6,393
60 to 89 Days Past Due | Home equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		1,889	983
60 to 89 Days Past Due | Residential real estate | Residential real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		1,964	267
60 to 89 Days Past Due | Residential real estate | PCI - residential real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due	[1]	202	0
60 to 89 Days Past Due | Premium finance receivables | Commercial insurance loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		6,624	5,995
60 to 89 Days Past Due | Premium finance receivables | Life insurance loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		3,432	13,084
60 to 89 Days Past Due | Premium finance receivables | PCI - life insurance loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due	[1]	0	0
60 to 89 Days Past Due | Consumer and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		204	293
30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		109,896	72,613
Loans, net of unearned income excluding covered loans, 30-59 days past due and still accruing		104,122	67,778
Covered loans, 30-59 days past due and still accruing		5,774	4,835
30 to 59 Days Past Due | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		21,476	11,558
30 to 59 Days Past Due | Commercial | Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		12,930	7,492
30 to 59 Days Past Due | Commercial | Franchise
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		0	1,219
30 to 59 Days Past Due | Commercial | Mortgage warehouse lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		0	0
30 to 59 Days Past Due | Commercial | Community Advanatage - homeowners association
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		0	0
30 to 59 Days Past Due | Commercial | Aircraft
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		0	0
30 to 59 Days Past Due | Commercial | Asset-based lending
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		1,844	2,394
30 to 59 Days Past Due | Commercial | Tax exempt
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		0	0
30 to 59 Days Past Due | Commercial | Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		4,192	315
30 to 59 Days Past Due | Commercial | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		0	0
30 to 59 Days Past Due | Commercial | PCI - commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due	[1]	2,510	138
30 to 59 Days Past Due | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		39,243	27,887
30 to 59 Days Past Due | Commercial real estate | Residential construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		45	76
30 to 59 Days Past Due | Commercial real estate | Commercial construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		1,600	2,023
30 to 59 Days Past Due | Commercial real estate | Land
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		120	2,395
30 to 59 Days Past Due | Commercial real estate | Office
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		3,817	1,374
30 to 59 Days Past Due | Commercial real estate | Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		1,009	3,758
30 to 59 Days Past Due | Commercial real estate | Retail
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		2,310	3,301
30 to 59 Days Past Due | Commercial real estate | Multi-family
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		6,568	1,921
30 to 59 Days Past Due | Commercial real estate | Mixed use and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		7,215	9,023
30 to 59 Days Past Due | Commercial real estate | PCI - commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due	[1]	16,559	4,016
30 to 59 Days Past Due | Home equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		5,517	3,513
30 to 59 Days Past Due | Residential real estate | Residential real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		3,824	6,315
30 to 59 Days Past Due | Residential real estate | PCI - residential real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due	[1]	79	0
30 to 59 Days Past Due | Premium finance receivables | Commercial insurance loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		21,656	17,328
30 to 59 Days Past Due | Premium finance receivables | Life insurance loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		11,140	339
30 to 59 Days Past Due | Premium finance receivables | PCI - life insurance loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due	[1]	0	0
30 to 59 Days Past Due | Consumer and other
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 to 89 days past due		$ 1,187	$ 838

[1] PCI loans represent loans acquired with evidence of credit quality deterioration since origination, in accordance with ASC 310-30. Loan agings are based upon contractually required payments. See Note 4 - Loans for further discussion of these purchased loans.

[2] PCI loans represent loans acquired with evidence of credit quality deterioration since origination, in accordance with ASC 310-30. See Note 4 - Loans for further discussion of these purchased loans.