Loans (Major Classifications Of Loans) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Jun. 30, 2021	Dec. 31, 2020
Major classifications of loans [Abstract]
Total loans, gross		$ 3,125,584		$ 3,125,584			$ 2,643,384
Unamortized loan fees and costs		11,078		11,078			8,939
Total loans, net of unamortized loan fees and costs	[1]	3,136,662	$ 2,488,760	3,136,662	$ 2,488,760		2,652,323
Repayment of loans		46,426	44,433	143,784	125,326
SBL Non Real Estate [Member]
Major classifications of loans [Abstract]
Total loans, gross		171,845		171,845			255,318
Total loans, net of unamortized loan fees and costs	[1]	171,845	293,488	171,845	293,488		255,318
SBL Commercial Mortgage [Member]
Major classifications of loans [Abstract]
Total loans, gross		367,272		367,272			300,817
Total loans, net of unamortized loan fees and costs	[1]	367,272	270,264	367,272	270,264		300,817
SBL Construction [Member]
Major classifications of loans [Abstract]
Total loans, gross		23,117		23,117			20,273
Total loans, net of unamortized loan fees and costs	[1]	23,117	27,169	23,117	27,169		20,273
Small Business Loans [Member]
Major classifications of loans [Abstract]
Total loans, gross	[2]	562,234		562,234			576,408
Direct Lease Financing [Member]
Major classifications of loans [Abstract]
Total loans, gross		514,068		514,068			462,182
Total loans, net of unamortized loan fees and costs	[1]	514,068	430,675	514,068	430,675		462,182
SBLOC/IBLOC [Member]
Major classifications of loans [Abstract]
Total loans, gross	[3]	1,834,523		1,834,523			1,550,086
Total loans, net of unamortized loan fees and costs	[1]	1,834,523	1,428,253	1,834,523	1,428,253		1,550,086
Advisor Financing [Member]
Major classifications of loans [Abstract]
Total loans, gross	[4]	81,143		81,143			48,282
Total loans, net of unamortized loan fees and costs	[1]	81,143	26,600	$ 81,143	26,600		48,282
Loan amount, loan-to-value ratio				70.00%
Real Estate Bridge Lending [Member]
Major classifications of loans [Abstract]
Total loans, gross		128,699		$ 128,699
Total loans, net of unamortized loan fees and costs	[1]	128,699		128,699
Other Loans [Member]
Major classifications of loans [Abstract]
Total loans, gross	[5]	4,917		4,917			6,426
Total loans, net of unamortized loan fees and costs	[1]	4,917	$ 6,003	4,917	$ 6,003		6,426
Consumer - Other [Member]
Major classifications of loans [Abstract]
Demand deposit overdrafts reclassified as loan balances		272		272			663
Small Business Loans: Non-SBA Loans [Member]
Major classifications of loans [Abstract]
Total loans, gross		171,800		171,800		$ 229,000
PPP Loans [Member]
Major classifications of loans [Abstract]
Total loans, gross		71,300		71,300			165,700
IBLOC [Member]
Major classifications of loans [Abstract]
Total loans, gross		$ 686,800		686,800			$ 437,200
US Government [Member] | PPP Loans [Member]
Major classifications of loans [Abstract]
Repayment of loans				$ 58,200

[1] The ending balance for loans in the unallocated column represents deferred costs and fees.

[2] The preceding table shows small business loans and small business loans held at fair value. The small business loans held at fair value are comprised of the government guaranteed portion of SBA 7a loans at the dates indicated. A reduction in SBL non-real estate loans from $229.0 million at June 30, 2021 to $171.8 million at September 30, 2021 resulted from U.S. government repayments of $58.2 million of Paycheck Protection Program (“PPP”) loans authorized by The Consolidated Appropriations Act, 2021. PPP loans totaled $71.3 million at September 30, 2021 and $165.7 million at December 31, 2020, respectively.

[3] Securities Backed Lines of Credit, or SBLOC, are collateralized by marketable securities, while Insurance Backed Lines of Credit, or IBLOC, are collateralized by the cash surrender value of insurance policies. At September 30, 2021 and December 31, 2020, respectively, IBLOC loans amounted to $686.8 million and $437.2 million.

[4] In 2020, the Company began originating loans to investment advisors for purposes of debt refinance, acquisition of another firm or internal succession. Maximum loan amounts are subject to loan-to-value ratios of 70%, based on third-party business appraisals, but may be increased depending upon the debt service coverage ratio. Personal guarantees and blanket business liens are obtained as appropriate.

[5] Included in the table above under Other loans are demand deposit overdrafts reclassified as loan balances totaling $272,000 and $663,000 at September 30, 2021 and December 31, 2020, respectively. Estimated overdraft charge-offs and recoveries are reflected in the allowance for credit losses and have been immaterial.