Bank Deposits (Scheduled Maturities of Certificates of Deposit) (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Deposits Liabilities Balance Sheet Reported Amounts [Abstract]
Within one year	$ 3,719	$ 5,305
One to three years	855	360
Three to five years	13	13
Certificates of deposit, less than $100,000	4,587	5,678
Within one year	106,878	441,341
One to three years	48,876	68,855
Three to five years	200	7,084
Certificates of deposit, $100,000 and greater	155,954	517,280
Total certificates of deposit	$ 160,541	$ 522,958