Deferred Policy Acquisition Costs - Activity in Deferred Policy Acquisition Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance at beginning of period	$ 12,243	$ 11,906
Deferred policy acquisition costs	6,966	5,905
Amortization of policy acquisition costs	(6,750)	(6,303)
Net change	216	(398)
Balance at end of period	$ 12,459	$ 11,508