Deferred Policy Acquisition Costs - Activity in Deferred Policy Acquisition Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance at beginning of period	$ 12,243	$ 11,906	$ 12,011
Deferred policy acquisition costs	28,475	26,442	24,806
Amortization of policy acquisition costs	(28,451)	(26,105)	(24,911)
Net change	24	337	(105)
Balance at end of period	$ 12,267	$ 12,243	$ 11,906