Allowance for Credit Losses (Note Restructurings During Period) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) loans	Dec. 31, 2019 USD ($) loans	Dec. 31, 2018 USD ($) loans
Non-PCD Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	599
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 92,688
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	226
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 20,802
Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans		505	491
Financing Receivable, Modifications, Post-Modification Recorded Investment | $		$ 52,169	$ 43,554
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans		190	164
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $		$ 19,709	$ 13,318
Principal Forgiveness [Member] | Non-PCD Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	37
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 32,314
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	9
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 7,067
Principal Forgiveness [Member] | Non-PCD Loans | Commercial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	31
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 28,145
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	4
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 4,498
Principal Forgiveness [Member] | Non-PCD Loans | Consumer
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	6
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 4,169
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	5
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 2,569
Principal Forgiveness [Member] | Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans		18	3
Financing Receivable, Modifications, Post-Modification Recorded Investment | $		$ 5,613	$ 1,003
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans		3	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $		$ 2,955	$ 0
Principal Forgiveness [Member] | Non-PCI Loans | Commercial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans		11	3
Financing Receivable, Modifications, Post-Modification Recorded Investment | $		$ 1,595	$ 1,003
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans		1	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $		$ 238	$ 0
Principal Forgiveness [Member] | Non-PCI Loans | Consumer
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans		7	0
Financing Receivable, Modifications, Post-Modification Recorded Investment | $		$ 4,018	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans		2	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $		$ 2,717	$ 0
Extended Maturity [Member] | Non-PCD Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	92
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 11,133
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	48
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 4,712
Extended Maturity [Member] | Non-PCD Loans | Commercial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	26
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 5,444
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	5
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 1,471
Extended Maturity [Member] | Non-PCD Loans | Consumer
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	66
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 5,689
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	43
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 3,241
Extended Maturity [Member] | Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans		18	42
Financing Receivable, Modifications, Post-Modification Recorded Investment | $		$ 4,246	$ 5,487
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans		6	8
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $		$ 839	$ 865
Extended Maturity [Member] | Non-PCI Loans | Commercial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans		16	21
Financing Receivable, Modifications, Post-Modification Recorded Investment | $		$ 3,904	$ 3,933
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans		5	4
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $		$ 533	$ 675
Extended Maturity [Member] | Non-PCI Loans | Consumer
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans		2	21
Financing Receivable, Modifications, Post-Modification Recorded Investment | $		$ 342	$ 1,554
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans		1	4
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $		$ 306	$ 190
Interest Rate Below Market Reduction [Member] | Non-PCD Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	254
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 39,944
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	86
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 5,809
Interest Rate Below Market Reduction [Member] | Non-PCD Loans | Commercial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	98
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 33,870
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	26
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 1,912
Interest Rate Below Market Reduction [Member] | Non-PCD Loans | Consumer
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	156
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 6,074
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	60
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 3,897
Interest Rate Below Market Reduction [Member] | Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans		266	269
Financing Receivable, Modifications, Post-Modification Recorded Investment | $		$ 26,390	$ 28,404
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans		90	92
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $		$ 6,648	$ 8,459
Interest Rate Below Market Reduction [Member] | Non-PCI Loans | Commercial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans		90	85
Financing Receivable, Modifications, Post-Modification Recorded Investment | $		$ 13,932	$ 12,859
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans		24	24
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $		$ 2,634	$ 2,998
Interest Rate Below Market Reduction [Member] | Non-PCI Loans | Consumer
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans		176	184
Financing Receivable, Modifications, Post-Modification Recorded Investment | $		$ 12,458	$ 15,545
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans		66	68
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $		$ 4,014	$ 5,461
Discharge of Debt [Member] | Non-PCD Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	216
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 9,297
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	83
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 3,214
Discharge of Debt [Member] | Non-PCD Loans | Commercial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	30
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 1,168
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	17
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 286
Discharge of Debt [Member] | Non-PCD Loans | Consumer
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans	186
Financing Receivable, Modifications, Post-Modification Recorded Investment | $	$ 8,129
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans	66
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $	$ 2,928
Discharge of Debt [Member] | Non-PCI Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans		203	177
Financing Receivable, Modifications, Post-Modification Recorded Investment | $		$ 15,920	$ 8,660
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans		91	64
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $		$ 9,267	$ 3,994
Discharge of Debt [Member] | Non-PCI Loans | Commercial
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans		25	26
Financing Receivable, Modifications, Post-Modification Recorded Investment | $		$ 5,571	$ 2,043
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans		20	8
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $		$ 5,028	$ 825
Discharge of Debt [Member] | Non-PCI Loans | Consumer
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | loans		178	151
Financing Receivable, Modifications, Post-Modification Recorded Investment | $		$ 10,349	$ 6,617
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans		71	56
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $		$ 4,239	$ 3,169