Restricted Cash Balances (Narrative) (Details) - USD ($)	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022
Restricted Cash Balances [Abstract]
Federal Reserve, reduction in reserve requirement, percent	0.00%
Reserves	$ 0	$ 0

Cash deposited in a special reserve account for the exclusive benefit of customers pursuant to SEC Regulations.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-SubTopic 210
-Topic 942
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481281/942-210-50-1

Name:	us-gaap_CashReserveDepositRequiredAndMade
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant