Loans and Leases (Details Textual) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Business Acquisition [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment		$ 101,878	[1]	$ 69,737	[2]	$ 100,161	[3]
Loans Receivable Held-for-sale, Amount		0		1,500,000
Loans held for sale, at lower of cost or fair value				481,100
Loan Receivable Held-For-Sale, Charge-offs		0		957		0
Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans		9,300		10,800
Financing Receivable, Recorded Investment, Nonaccrual Status		79,333		155,784	[4]
Loan Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due		10,723		14,200
Financing Receivable Recorded Investment Thirty to Eighty Nine Days Past Due		17,085		3,200
Financing Receivable Recorded Investment Nonaccrual Status Current				138,400
Unfunded Commitments For Troubled Debt Restructurings		1,300		4,500
Financing Receivable, Modifications, Post-Modification Recorded Investment		$ 90,373	[1]	59,237	[2]	89,443	[3]
Cash Flow [Member]
Business Acquisition [Line Items]
Proceeds from Sale of Loans Held-for-sale				1,000,000
Cash Flow [Member]
Business Acquisition [Line Items]
Loan Receivable Held-For-Sale, Charge-offs				$ 0
Purchased Credit Impaired Loans and Leases [Member]
Business Acquisition [Line Items]
Concentration Risk, Percentage				0.40%
Credit Concentration Risk [Member]
Business Acquisition [Line Items]
Concentration Risk, Percentage		52.90%
Financing Receivable, Recorded Investment, Nonaccrual Status		$ 42,000
Nonaccrual [Member]
Business Acquisition [Line Items]
Loan Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due		10,700
Financing Receivable Recorded Investment Thirty to Eighty Nine Days Past Due		6,600
Financing Receivable Recorded Investment Nonaccrual Status Current		62,000
Non Purchased Credit Impaired Loans and Leases [Member]
Business Acquisition [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	[5]			$ 155,784
Loan Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	[6]			14,165
Financing Receivable Recorded Investment Thirty to Eighty Nine Days Past Due	[6]			48,435
Commercial Portfolio Segment [Member]
Business Acquisition [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status		60,003
Loan Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due		1,931
Financing Receivable Recorded Investment Thirty to Eighty Nine Days Past Due		9,933
Commercial Portfolio Segment [Member] | Asset Based [Member]
Business Acquisition [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment		28,947	[1]	4,219		44,196
Financing Receivable, Recorded Investment, Nonaccrual Status		32,324
Loan Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due		646
Financing Receivable Recorded Investment Thirty to Eighty Nine Days Past Due		47
Financing Receivable, Modifications, Post-Modification Recorded Investment		$ 33,947	[1]	4,219		42,572
Commercial Portfolio Segment [Member] | Cash Flow [Member]
Business Acquisition [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment				31,471		32,946
Financing Receivable, Modifications, Post-Modification Recorded Investment				22,236		$ 32,946
Commercial Portfolio Segment [Member] | Non Purchased Credit Impaired Loans and Leases [Member]
Business Acquisition [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	[4],[5]			86,851
Loan Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	[6]			3,036
Financing Receivable Recorded Investment Thirty to Eighty Nine Days Past Due	[6]			9,723
Commercial Portfolio Segment [Member] | Non Purchased Credit Impaired Loans and Leases [Member] | Asset Based [Member]
Business Acquisition [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	[5]			33,553
Loan Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	[6]			690
Financing Receivable Recorded Investment Thirty to Eighty Nine Days Past Due	[6]			$ 344

[1] Represents the balance at December 31, 2018, and there were no

[2] Represents the balance at December 31, 2017, and is net of charge-offs of

[3] Represents the balance at December 31, 2016, and there were no

[4] Excludes PCI loans.

[5] Excludes PCI loans.

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