Loans and Leases (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Financing Receivable, Troubled Debt Restructuring, Premodification	$ 27,646	$ 101,878	$ 69,737
Loan Receivable Held-For-Sale, Charge-offs	0	0	957
Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans	8,100	9,300
Financing Receivable, Nonaccrual	92,353	79,333
Loan Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	11,085	10,723
Financing Receivable Recorded Investment Thirty to Eighty Nine Days Past Due	9,788	17,085
Unfunded Commitments For Troubled Debt Restructurings	1,200	1,300
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 27,663	$ 90,373	59,237
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	54.00%
Financing Receivable, Nonaccrual	$ 50,300
Nonaccrual [Member]
Business Acquisition [Line Items]
Loan Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	11,100	$ 10,700
Financing Receivable Recorded Investment Thirty to Eighty Nine Days Past Due	1,200	6,600
Financing Receivable Recorded Investment Nonaccrual Status Current	80,000	62,000
Non Purchased Credit Impaired Loans and Leases
Business Acquisition [Line Items]
Financing Receivable, Nonaccrual		79,333
Commercial Portfolio Segment [Member]
Business Acquisition [Line Items]
Financing Receivable, Nonaccrual	70,672
Loan Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	4,164	1,931
Financing Receivable Recorded Investment Thirty to Eighty Nine Days Past Due	2,800	9,933
Commercial Portfolio Segment [Member] | Asset Based [Member]
Business Acquisition [Line Items]
Financing Receivable, Troubled Debt Restructuring, Premodification	3,082	28,947	4,219	[1]
Financing Receivable, Nonaccrual	30,162
Loan Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	646
Financing Receivable Recorded Investment Thirty to Eighty Nine Days Past Due	19	47
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 3,082	33,947	$ 4,219	[1]
Commercial Portfolio Segment [Member] | Non Purchased Credit Impaired Loans and Leases
Business Acquisition [Line Items]
Financing Receivable, Nonaccrual		60,003
Commercial Portfolio Segment [Member] | Non Purchased Credit Impaired Loans and Leases | Asset Based [Member]
Business Acquisition [Line Items]
Financing Receivable, Nonaccrual		$ 32,324

[1] One commercial asset-based loan with a pre-modification balance of $27.3 million and a post-modification balance of $32.3 million was previously restructured in December 2017.