Bank Deposits (Scheduled Maturities of Certificates of Deposit) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Deposits Liabilities Balance Sheet Reported Amounts [Abstract]
Within one year	$ 2,719	$ 5,305
One to three years	409	360
Three to five years	254	13
Certificates of deposit, less than $100,000	3,382	5,678
Within one year	63,650	441,341
One to three years	30,622	68,855
Three to five years		7,084
Certificates of deposit, $100,000 and greater	94,272	517,280
Total certificates of deposit	$ 97,654	$ 522,958