Reinsurance (Schedule of Reinsurance Ceded and Recoveries) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Reinsurance [Abstract]
Ceded earned premiums	$ 80,447	$ 83,242	$ 250,240	$ 229,697
Reinsurance recoveries	$ 64,697	$ 50,564	$ 217,814	$ 158,128