Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2020	25,525,796
Balance as of January 1 at Dec. 31, 2020	$ 3	$ 310,507	$ 13,246	$ 39,957	$ 363,713
Other comprehensive income (loss), net of tax	0	0	(7,934)	0	(7,934)
Stock-based compensation	$ 0	5,584	0		5,584
Issuance of common stock via employee stock purchase plan (in shares)	9,793
Issuance of common stock via employee stock purchase plan	$ 0	719	0	0	719
Issuance of common stock via equity incentive plan (in shares)	132,436
Issuance of common stock via equity incentive plan	$ 0	2,092	0	0	2,092
Repurchases of common stock (in shares)	(239,096)
Repurchases of common stock	$ 0	0	0	(15,852)	(15,852)
Net income	$ 0	0	0	45,847	45,847
Balance (in shares) at Dec. 31, 2021	25,428,929
Balance at end of period at Dec. 31, 2021	$ 3	318,902	5,312	69,952	394,169
Other comprehensive income (loss), net of tax	0	0	(41,827)	0	(41,827)
Stock-based compensation	$ 0	11,624	0	0	$ 11,624
Issuance of common stock via employee stock purchase plan (in shares)	13,990				13,990
Issuance of common stock via employee stock purchase plan	$ 0	760	0	0	$ 760
Issuance of common stock via equity incentive plan (in shares)	205,963
Issuance of common stock via equity incentive plan	$ 0	2,272	0	0	2,272
Repurchases of common stock (in shares)	(621,415)
Repurchases of common stock	$ 0	0	0	(34,414)	(34,414)
Net income	$ 0	0	0	52,170	52,170
Balance (in shares) at Dec. 31, 2022	25,027,467
Balance at end of period at Dec. 31, 2022	$ 3	333,558	(36,515)	87,708	384,754
Other comprehensive income (loss), net of tax	0	0	12,524	0	12,524
Stock-based compensation	$ 0	14,913	0	0	$ 14,913
Issuance of common stock via employee stock purchase plan (in shares)	17,080				17,080
Issuance of common stock via employee stock purchase plan	$ 0	799	0	0	$ 799
Issuance of common stock via equity incentive plan (in shares)	147,341
Issuance of common stock via equity incentive plan	$ 0	1,237	0	0	1,237
Repurchases of common stock (in shares)	(418,901)
Repurchases of common stock	$ 0	0	0	(22,266)	(22,266)
Net income	0	0	0	79,201	79,201
Policyholder contribution to surplus	$ 0	90	0	0	90
Balance (in shares) at Dec. 31, 2023	24,772,987
Balance at end of period at Dec. 31, 2023	$ 3	$ 350,597	$ (23,991)	$ 144,643	$ 471,252