Bank Deposits (Scheduled Maturities of Certificates of Deposit) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Deposits Liabilities Balance Sheet Reported Amounts [Abstract]
Within one year	$ 2,117	$ 2,719
One to three years	102	409
Three to five years	54	254
Certificates of deposit, less than $100,000	2,273	3,382
Within one year	30,359	63,650
One to three years	23,602	30,622
Three to five years	100
Certificates of deposit, $100,000 and greater	54,061	94,272
Total certificates of deposit	$ 56,334	$ 97,654