Deferred Policy Acquisition Costs (Schedule of deferred policy acquisition costs) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Deferred Policy Acquisition Costs Disclosures [Abstract]
Balance, beginning of period	$ 24,204	$ 16,721	$ 15,399	$ 12,866
Deferral of policy acquisition costs	14,742	10,392	47,763	39,620
Amortization of deferred policy acquisition costs	(15,061)	(11,309)	(39,277)	(36,682)
Balance, end of period	$ 23,885	$ 15,804	$ 23,885	$ 15,804