Loans (Delinquent Loans By Loan Category) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	$ 5,645	$ 5,796
Total past due	29,871	16,269
Current	1,955,884	1,807,976
Total loans, net of unamortized loan fees and costs	1,985,755	1,824,245	$ 1,510,395
30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	20,116	2,334
60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,865	4,875
90+ Days Still Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	2,245	3,264
SBL Non Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	3,565	3,693
Total past due	4,156	3,854
Current	80,790	80,725
Total loans, net of unamortized loan fees and costs	84,946	84,579	76,112
SBL Non Real Estate [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	185	36
SBL Non Real Estate [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	406	125
SBL Commercial Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	1,047	1,047
Total past due	1,047	3,030
Current	232,173	215,080
Total loans, net of unamortized loan fees and costs	233,220	218,110	179,397
SBL Commercial Mortgage [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		1,983
SBL Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	711	711
Total past due	711	711
Current	48,112	44,599
Total loans, net of unamortized loan fees and costs	48,823	45,310	23,979
Direct Lease Financing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	12,783	7,964
Current	433,184	426,496
Total loans, net of unamortized loan fees and costs	445,967	434,460	384,930
Direct Lease Financing [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	9,079	2,008
Direct Lease Financing [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,459	2,692
Direct Lease Financing [Member] | 90+ Days Still Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	2,245	3,264
SBLOC/IBLOC [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	10,835	365
Current	1,145,598	1,024,055
Total loans, net of unamortized loan fees and costs	1,156,433	1,024,420	791,986
SBLOC/IBLOC [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	10,835	290
SBLOC/IBLOC [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		75
Other Specialty Lending [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	2,711	3,055
Total loans, net of unamortized loan fees and costs	2,711	3,055	$ 34,425
Consumer - other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	322	345
Total past due	17
Current	684	1,137
Total loans, net of unamortized loan fees and costs	701	1,137
Consumer - other [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	17
Consumer - Home Equity [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-accrual	322	345
Total past due	322	345
Current	3,000	3,072
Total loans, net of unamortized loan fees and costs	3,322	3,417
Unamortized Loan Fees And Costs [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	9,632	9,757
Total loans, net of unamortized loan fees and costs	$ 9,632	$ 9,757