Loans (Delinquent Loans By Loan Category) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	$ 12,275	$ 5,796
Total past due	23,292	16,269
Current	2,465,468	1,807,976
Total loans, net of unamortized loan fees and costs	2,488,760	1,824,245	$ 1,683,377
30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	8,838	2,334
60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	2,155	4,875
90+ Days Still Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	24	3,264
SBL Non Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	2,935	3,693
Total past due	6,006	3,854
Current	287,482	80,725
Total loans, net of unamortized loan fees and costs	293,488	84,579	84,181
SBL Non Real Estate [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	2,631	36
SBL Non Real Estate [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	440	125
SBL Commercial Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	7,517	1,047
Total past due	10,454	3,030
Current	259,810	215,080
Total loans, net of unamortized loan fees and costs	270,264	218,110	209,008
SBL Commercial Mortgage [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	2,087
SBL Commercial Mortgage [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	850	1,983
SBL Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	711	711
Total past due	711	711
Current	26,458	44,599
Total loans, net of unamortized loan fees and costs	27,169	45,310	38,116
Direct Lease Financing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	804
Total past due	2,277	7,964
Current	428,398	426,496
Total loans, net of unamortized loan fees and costs	430,675	434,460	412,755
Direct Lease Financing [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	946	2,008
Direct Lease Financing [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	503	2,692
Direct Lease Financing [Member] | 90+ Days Still Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	24	3,264
SBLOC/IBLOC [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	3,536	365
Current	1,424,717	1,024,055
Total loans, net of unamortized loan fees and costs	1,428,253	1,024,420	920,463
SBLOC/IBLOC [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	3,174	290
SBLOC/IBLOC [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	362	75
Advisor Financing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	26,600
Total loans, net of unamortized loan fees and costs	26,600
Other Specialty Lending [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	2,194	3,055
Total loans, net of unamortized loan fees and costs	2,194	3,055	$ 3,167
Consumer - Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	308	345
Current	650	1,137
Total loans, net of unamortized loan fees and costs	650	1,137
Consumer - Home Equity [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	308	345
Total past due	308	345
Current	2,851	3,072
Total loans, net of unamortized loan fees and costs	3,159	3,417
Unamortized Loan Fees And Costs [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	6,308	9,757
Total loans, net of unamortized loan fees and costs	$ 6,308	$ 9,757