Fair Value Accounting (Changes in Level 3 Fair Value Measurements) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
GGL / SBA Loans Servicing Asset
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 3,019	$ 3,326	$ 3,040	$ 3,729
Included in earnings	(187)	(298)	(742)	(1,091)
Unrealized gains (losses) included in OCI	0	0	0	0
Additions	268	322	802	712
Settlements	0	0	0	0
Ending balance	3,100	3,350	3,100	3,350
Total net losses for the period included in earnings attributable to the change in unrealized losses relating to assets/liabilities still held	0	0	0	0
Earnout Liability
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	(15,924)	(14,353)	(11,016)	(14,353)
Included in earnings	0	(10,457)	(4,908)	(10,457)
Unrealized gains (losses) included in OCI	0	0	0	0
Additions	0	0	0	0
Settlements	0	0	0	0
Ending balance	(15,924)	(24,810)	(15,924)	(24,810)
Total net losses for the period included in earnings attributable to the change in unrealized losses relating to assets/liabilities still held	0	(10,457)	(4,908)	(10,457)
Visa Derivative
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	(1,755)	(1,049)	(2,339)	(1,673)
Included in earnings	0	(2,500)	0	(2,500)
Unrealized gains (losses) included in OCI	0	0	0	0
Additions	0	0	0	0
Settlements	295	214	879	838
Ending balance	(1,460)	(3,335)	(1,460)	(3,335)
Total net losses for the period included in earnings attributable to the change in unrealized losses relating to assets/liabilities still held	0	(2,500)	0	(2,500)
Investment Securities Available for Sale
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	1,662	2,017	2,105	1,785
Included in earnings	0	0		0
Unrealized gains (losses) included in OCI	138	(26)	(305)	206
Additions	0	0	0	0
Settlements	0	0	0	0
Ending balance	1,800	1,991	1,800	1,991
Total net losses for the period included in earnings attributable to the change in unrealized losses relating to assets/liabilities still held	0	0	0	0
Private Equity Investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	698	13,341	3,887	11,028
Included in earnings	260	1,194	(2,929)	3,507
Unrealized gains (losses) included in OCI	0	0	0	0
Additions	0	0	0	0
Settlements	0	(3,246)	0	(3,246)
Ending balance	958	11,289	958	11,289
Total net losses for the period included in earnings attributable to the change in unrealized losses relating to assets/liabilities still held	$ 260	$ 777	$ (2,929)	$ 3,090