Reinsurance (Schedule of Premium Receivable Allowance for Credit Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Premium Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for expected credit losses, beginning of period	$ 25,218	$ 22,883
Change in allowance for expected credit losses	5,442	2,335
Allowance for expected credit losses, end of period	$ 30,660	$ 25,218