Customer Deposits - Investment Certificates (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Investment Certificates
Amount of reserves that do not allow for a surrender charge	$ 1,500,000	$ 2,200,000
Minimum
Investment Certificates
Amount of fixed rate investment certificates	$ 1
Term of fixed rate investment certificates	3 months
Maximum
Investment Certificates
Amount of fixed rate investment certificates	$ 2,000
Term of fixed rate investment certificates	36 months