Loans (Financing Receivables Credit Quality Indicators Table) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance		$ 130,458
Commercial and Industrial Financing Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance		7,318
Construction Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance		339
Originated Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	$ 14,118,505	12,493,812	$ 10,213,387
Originated Loans | Commercial and Industrial Financing Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	5,793,408	5,175,201	4,139,567
Originated Loans | Commercial and Industrial Financing Receivable | Grade 1
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	60,440	52,676
Originated Loans | Commercial and Industrial Financing Receivable | Grade 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	353,581	186,278
Originated Loans | Commercial and Industrial Financing Receivable | Grade 3
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	1,371,850	1,340,100
Originated Loans | Commercial and Industrial Financing Receivable | Grade 4
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	3,756,333	3,413,446
Originated Loans | Commercial and Industrial Financing Receivable | Grade 5
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	124,140	139,083
Originated Loans | Commercial and Industrial Financing Receivable | Grade 6
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	124,483	43,618
Originated Loans | Commercial and Industrial Financing Receivable | Grade 7
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	2,581	0
Originated Loans | Real Estate Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	2,077,344	2,117,118
Originated Loans | Real Estate Loan | Grade 1
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	773	683
Originated Loans | Real Estate Loan | Grade 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	831	3,454
Originated Loans | Real Estate Loan | Grade 3
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	319,987	294,281
Originated Loans | Real Estate Loan | Grade 4
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	1,697,261	1,745,470
Originated Loans | Real Estate Loan | Grade 5
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	18,388	29,990
Originated Loans | Real Estate Loan | Grade 6
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	40,105	43,240
Originated Loans | Real Estate Loan | Grade 7
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	(1)	0
Originated Loans | Construction Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	645,337	537,766	$ 338,925
Originated Loans | Construction Loans | Grade 1
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	678
Originated Loans | Construction Loans | Grade 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Originated Loans | Construction Loans | Grade 3
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	59,182	46,074
Originated Loans | Construction Loans | Grade 4
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	569,098	490,757
Originated Loans | Construction Loans | Grade 5
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	7,193	257
Originated Loans | Construction Loans | Grade 6
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	9,864	0
Originated Loans | Construction Loans | Grade 7
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Originated Loans | Commercial Leases Financing Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	491,741	370,179
Originated Loans | Commercial Leases Financing Receivable | Grade 1
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	12,732	4,451
Originated Loans | Commercial Leases Financing Receivable | Grade 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	69,258	14,959
Originated Loans | Commercial Leases Financing Receivable | Grade 3
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	49,956	71,908
Originated Loans | Commercial Leases Financing Receivable | Grade 4
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	344,763	277,277
Originated Loans | Commercial Leases Financing Receivable | Grade 5
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	7,858	1,389
Originated Loans | Commercial Leases Financing Receivable | Grade 6
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	7,174	195
Originated Loans | Commercial Leases Financing Receivable | Grade 7
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Originated Loans | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	9,007,830	8,200,264
Originated Loans | Commercial | Grade 1
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	73,945	58,488
Originated Loans | Commercial | Grade 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	423,670	204,691
Originated Loans | Commercial | Grade 3
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	1,800,975	1,752,363
Originated Loans | Commercial | Grade 4
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	6,367,455	5,926,950
Originated Loans | Commercial | Grade 5
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	157,579	170,719
Originated Loans | Commercial | Grade 6
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	181,626	87,053
Originated Loans | Commercial | Grade 7
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	2,580	0
Acquired Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	1,743,071	2,479,180
Acquired Loans | Commercial and Industrial Financing Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	240,145	449,254
Acquired Loans | Commercial and Industrial Financing Receivable | Grade 1
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	346	1,076
Acquired Loans | Commercial and Industrial Financing Receivable | Grade 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Acquired Loans | Commercial and Industrial Financing Receivable | Grade 3
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	15,548	20,891
Acquired Loans | Commercial and Industrial Financing Receivable | Grade 4
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	200,736	376,129
Acquired Loans | Commercial and Industrial Financing Receivable | Grade 5
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	11,735	23,268
Acquired Loans | Commercial and Industrial Financing Receivable | Grade 6
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	11,780	27,890
Acquired Loans | Commercial and Industrial Financing Receivable | Grade 7
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Acquired Loans | Real Estate Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	430,891	630,674
Acquired Loans | Real Estate Loan | Grade 1
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Acquired Loans | Real Estate Loan | Grade 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Acquired Loans | Real Estate Loan | Grade 3
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	27,387	24,867
Acquired Loans | Real Estate Loan | Grade 4
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	361,518	532,447
Acquired Loans | Real Estate Loan | Grade 5
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	12,546	28,382
Acquired Loans | Real Estate Loan | Grade 6
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	29,440	44,978
Acquired Loans | Real Estate Loan | Grade 7
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Acquired Loans | Construction Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	6,113	6,971
Acquired Loans | Construction Loans | Grade 1
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Acquired Loans | Construction Loans | Grade 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Acquired Loans | Construction Loans | Grade 3
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Acquired Loans | Construction Loans | Grade 4
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	5,380	6,286
Acquired Loans | Construction Loans | Grade 5
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	685
Acquired Loans | Construction Loans | Grade 6
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	733	0
Acquired Loans | Construction Loans | Grade 7
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Acquired Loans | Commercial Leases Financing Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Acquired Loans | Commercial Leases Financing Receivable | Grade 1
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Acquired Loans | Commercial Leases Financing Receivable | Grade 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Acquired Loans | Commercial Leases Financing Receivable | Grade 3
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Acquired Loans | Commercial Leases Financing Receivable | Grade 4
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Acquired Loans | Commercial Leases Financing Receivable | Grade 5
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Acquired Loans | Commercial Leases Financing Receivable | Grade 6
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Acquired Loans | Commercial Leases Financing Receivable | Grade 7
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Acquired Loans | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	677,149	1,086,899
Acquired Loans | Commercial | Grade 1
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	346	1,076
Acquired Loans | Commercial | Grade 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Acquired Loans | Commercial | Grade 3
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	42,935	45,758
Acquired Loans | Commercial | Grade 4
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	567,634	914,862
Acquired Loans | Commercial | Grade 5
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	24,281	52,335
Acquired Loans | Commercial | Grade 6
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	41,953	72,868
Acquired Loans | Commercial | Grade 7
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	205,422	331,122
Covered Loans | Commercial and Industrial Financing Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	35,466	48,837
Covered Loans | Commercial and Industrial Financing Receivable | Grade 1
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans | Commercial and Industrial Financing Receivable | Grade 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	1,072	1,347
Covered Loans | Commercial and Industrial Financing Receivable | Grade 3
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans | Commercial and Industrial Financing Receivable | Grade 4
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	31,637	36,406
Covered Loans | Commercial and Industrial Financing Receivable | Grade 5
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	295	167
Covered Loans | Commercial and Industrial Financing Receivable | Grade 6
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	2,462	10,917
Covered Loans | Commercial and Industrial Financing Receivable | Grade 7
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans | Real Estate Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	87,774	153,508
Covered Loans | Real Estate Loan | Grade 1
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans | Real Estate Loan | Grade 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans | Real Estate Loan | Grade 3
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	7,004	0
Covered Loans | Real Estate Loan | Grade 4
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	49,917	86,779
Covered Loans | Real Estate Loan | Grade 5
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	3,401
Covered Loans | Real Estate Loan | Grade 6
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	30,853	63,328
Covered Loans | Real Estate Loan | Grade 7
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans | Construction Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	5,869	9,262
Covered Loans | Construction Loans | Grade 1
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans | Construction Loans | Grade 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans | Construction Loans | Grade 3
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans | Construction Loans | Grade 4
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	819	823
Covered Loans | Construction Loans | Grade 5
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans | Construction Loans | Grade 6
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	5,050	8,248
Covered Loans | Construction Loans | Grade 7
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	191
Covered Loans | Commercial Leases Financing Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans | Commercial Leases Financing Receivable | Grade 1
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans | Commercial Leases Financing Receivable | Grade 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans | Commercial Leases Financing Receivable | Grade 3
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans | Commercial Leases Financing Receivable | Grade 4
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans | Commercial Leases Financing Receivable | Grade 5
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans | Commercial Leases Financing Receivable | Grade 6
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans | Commercial Leases Financing Receivable | Grade 7
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	129,109	211,607
Covered Loans | Commercial | Grade 1
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	0	0
Covered Loans | Commercial | Grade 2
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	1,072	1,347
Covered Loans | Commercial | Grade 3
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	7,004	0
Covered Loans | Commercial | Grade 4
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	82,373	124,008
Covered Loans | Commercial | Grade 5
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	295	3,568
Covered Loans | Commercial | Grade 6
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	38,365	82,493
Covered Loans | Commercial | Grade 7
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total ending originated loan balance	$ 0	$ 191