Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Available-for-sale, amortized cost	$ 1,662,680	$ 1,656,797
Available-for-sale securities, allowance for credit losses	3	0
Equity securities, cost	75,292	84,605
Allowance for doubtful accounts	1,575	781
Property and equipment, accumulated depreciation	59,566	60,142
Reinsurance receivables, allowance for credit losses	$ 82	$ 102
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)	25,210,541	25,082,104
Common stock, shares outstanding (in shares)	25,210,541	25,082,104