Consolidated Statement of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands		Total	Common stock	Additional paid-in capital	Retained earnings	Accumulated other comprehensive income (loss)
Beginning balance at Dec. 31, 2023			$ 25	$ 209,986	$ 574,691	$ (50,957)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock based compensation				3,388
Net Income (loss)		$ 30,515			30,515
Dividends on common stock ($0.16 and $0.48 per share)					(12,154)
Change in net unrealized investment gain (loss)	[1]					31,180
Change in liability for underfunded employee benefit plans	[1]					(1,716)
Foreign currency translation adjustment, tax impact		865				865
Ending balance at Sep. 30, 2024		785,823	$ 25	213,374	593,052	(20,628)
Balance, beginning (in shares) at Dec. 31, 2023			25,269,842
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock based compensation (in shares)			71,406
Balance, ending (in shares) at Sep. 30, 2024			25,341,248
Beginning balance at Jun. 30, 2024			$ 25	212,327	577,359	(63,116)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock based compensation				1,047
Net Income (loss)		19,748			19,748
Dividends on common stock ($0.16 and $0.48 per share)					(4,055)
Change in net unrealized investment gain (loss)	[1]					42,207
Change in liability for underfunded employee benefit plans	[1]					(572)
Foreign currency translation adjustment, tax impact		853				853
Ending balance at Sep. 30, 2024		785,823	$ 25	213,374	593,052	(20,628)
Balance, beginning (in shares) at Jun. 30, 2024			25,336,103
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock based compensation (in shares)			5,145
Balance, ending (in shares) at Sep. 30, 2024			25,341,248
Beginning balance at Dec. 31, 2024		781,531	$ 25	215,851	620,436	(54,781)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock based compensation				5,782
Net Income (loss)		79,837			79,837
Dividends on common stock ($0.16 and $0.48 per share)					(12,223)
Change in net unrealized investment gain (loss)	[1]					43,727
Change in liability for underfunded employee benefit plans	[1]					(1,716)
Foreign currency translation adjustment, tax impact		2,244				1,773
Ending balance at Sep. 30, 2025		$ 898,711	$ 25	221,633	688,050	(10,997)
Balance, beginning (in shares) at Dec. 31, 2024		25,378,291	25,378,291
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock based compensation (in shares)			136,038
Balance, ending (in shares) at Sep. 30, 2025		25,514,329	25,514,329
Beginning balance at Jun. 30, 2025			$ 25	218,332	653,026	(25,715)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock based compensation				3,301
Net Income (loss)		$ 39,190			39,190
Dividends on common stock ($0.16 and $0.48 per share)					(4,082)
Change in net unrealized investment gain (loss)	[1]					16,223
Change in liability for underfunded employee benefit plans	[1]					(572)
Foreign currency translation adjustment, tax impact		(462)			(84)	(933)
Ending balance at Sep. 30, 2025		$ 898,711	$ 25	$ 221,633	$ 688,050	$ (10,997)
Balance, beginning (in shares) at Jun. 30, 2025			25,490,995
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock based compensation (in shares)			23,334
Balance, ending (in shares) at Sep. 30, 2025		25,514,329	25,514,329

[1] Amount is net of reclassification adjustments and income taxes.