Allowance for Loan and Lease Losses (Note Restructurings During Period) (Details) - Non-PCI Loans $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) loans	Dec. 31, 2018 USD ($) loans	Dec. 31, 2017 USD ($) loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	190	164	204
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 19,709	$ 13,318	$ 11,990
Financing Receivable, Modifications, Number of Contracts | loans	505	491	632
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 52,169	$ 43,554	$ 49,000
Principal Forgiveness [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	3	0	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 2,955	$ 0	$ 634
Financing Receivable, Modifications, Number of Contracts | loans	18	3	6
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 5,613	$ 1,003	$ 1,206
Principal Forgiveness [Member] | Commercial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	1	0	1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 238	$ 0	$ 634
Financing Receivable, Modifications, Number of Contracts | loans	11	3	5
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 1,595	$ 1,003	$ 1,124
Principal Forgiveness [Member] | Noncommercial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	2	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 2,717	$ 0	$ 0
Financing Receivable, Modifications, Number of Contracts | loans	7	0	1
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 4,018	$ 0	$ 82
Extended Maturity [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	6	8	2
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 839	$ 865	$ 273
Financing Receivable, Modifications, Number of Contracts | loans	18	42	47
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 4,246	$ 5,487	$ 6,517
Extended Maturity [Member] | Commercial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	5	4	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 533	$ 675	$ 0
Financing Receivable, Modifications, Number of Contracts | loans	16	21	13
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 3,904	$ 3,933	$ 3,007
Extended Maturity [Member] | Noncommercial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	1	4	2
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 306	$ 190	$ 273
Financing Receivable, Modifications, Number of Contracts | loans	2	21	34
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 342	$ 1,554	$ 3,510
Interest Rate Below Market Reduction [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	90	92	110
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 6,648	$ 8,459	$ 7,983
Financing Receivable, Modifications, Number of Contracts | loans	266	269	363
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 26,390	$ 28,404	$ 30,412
Interest Rate Below Market Reduction [Member] | Commercial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	24	24	32
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 2,634	$ 2,998	$ 3,392
Financing Receivable, Modifications, Number of Contracts | loans	90	85	92
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 13,932	$ 12,859	$ 14,811
Interest Rate Below Market Reduction [Member] | Noncommercial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	66	68	78
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 4,014	$ 5,461	$ 4,591
Financing Receivable, Modifications, Number of Contracts | loans	176	184	271
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 12,458	$ 15,545	$ 15,601
Discharge of Debt [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	91	64	91
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 9,267	$ 3,994	$ 3,100
Financing Receivable, Modifications, Number of Contracts | loans	203	177	216
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 15,920	$ 8,660	$ 10,865
Discharge of Debt [Member] | Commercial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	20	8	26
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 5,028	$ 825	$ 708
Financing Receivable, Modifications, Number of Contracts | loans	25	26	39
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 5,571	$ 2,043	$ 3,012
Discharge of Debt [Member] | Noncommercial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	71	56	65
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 4,239	$ 3,169	$ 2,392
Financing Receivable, Modifications, Number of Contracts | loans	178	151	177
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 10,349	$ 6,617	$ 7,853