Bank Deposits (Scheduled Maturities of Certificates of Deposit) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Deposits Liabilities Balance Sheet Reported Amounts [Abstract]
Within one year	$ 4,971	$ 5,305
One to three years	6,212	360
Three to five years	213	13
Certificates of deposit, less than $100,000	11,396	5,678
Within one year	175,825	441,341
One to three years	39,864	68,855
Three to five years		7,084
Certificates of deposit, $100,000 and greater	215,689	517,280
Total certificates of deposit	$ 227,085	$ 522,958