Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Available-for-sale, amortized cost	$ 1,684,249	$ 1,662,680
Equity securities, cost	70,565	75,292
Allowance for doubtful accounts	1,701	1,575
Property and equipment accumulated depreciation	62,027	59,566
Reinsurance receivables and recoverables, allowance for credit losses	$ 94	$ 82
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	75,000,000	75,000,000
Common stock, shares issued (in shares)	25,231,553	25,210,541
Common stock, shares outstanding (in shares)	25,231,553	25,210,541