Consolidated Condensed Statements of Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2022	81,115
Balance at Dec. 31, 2022	$ 811	$ 47,188	$ 655,920	$ 703,919
Net income	$ 0	0	22,502	22,502
Issuance of common stock from share-based payment arrangement exercises and vesting of performance unit awards (in shares)	119
Issuance of common stock from share-based payment arrangement exercises and vesting of performance unit awards	$ 1	535	0	536
Employee taxes paid in exchange for shares withheld	0	(926)	0	(926)
Share-based payment arrangement compensation expense		354	0	354
Dividends on common stock	$ 0	0	(4,874)	(4,874)
Issuance of common stock from share-based payment arrangement exercises (in shares)	119
Net income	$ 0	0	22,502	22,502
Employee taxes paid in exchange for shares withheld	$ (0)	926	(0)	926
Balance (in shares) at Mar. 31, 2023	81,234
Balance at Mar. 31, 2023	$ 812	47,151	673,548	721,511
Net income	$ 0	0	47,871	47,871
Issuance of common stock from share-based payment arrangement exercises and vesting of performance unit awards (in shares)	78
Issuance of common stock from share-based payment arrangement exercises and vesting of performance unit awards	$ 1	673	0	674
Share-based payment arrangement compensation expense		1,965	0	1,965
Dividends on common stock	$ 0	0	(14,635)	(14,635)
Issuance of common stock from share-based payment arrangement exercises (in shares)	78
Net income	$ 0	0	47,871	47,871
Balance (in shares) at Dec. 31, 2023	81,312
Balance at Dec. 31, 2023	$ 813	49,789	706,784	757,386
Net income	$ 0	0	9,646	9,646
Issuance of common stock from share-based payment arrangement exercises and vesting of performance unit awards (in shares)	51
Issuance of common stock from share-based payment arrangement exercises and vesting of performance unit awards	$ 1	306	0	307
Employee taxes paid in exchange for shares withheld	$ 0	382	0	382
Share-based payment arrangement compensation expense		353	0	353
Dividends on common stock			(4,881)	(4,881)
Issuance of common stock from share-based payment arrangement exercises (in shares)	51
Net income	$ 0	0	9,646	9,646
Employee taxes paid in exchange for shares withheld	$ 0	(382)	0	(382)
Balance (in shares) at Mar. 31, 2024	81,363
Balance at Mar. 31, 2024	$ 814	$ 50,066	$ 711,549	$ 762,429