Note 14 - Earnings Per Share - Computation of Basic and Diluted Earnings per Share (Details) $ / shares in Units, $ in Thousands		6 Months Ended				12 Months Ended
	Jun. 20, 2023	Dec. 31, 2023 USD ($) $ / shares shares	Jun. 20, 2023 USD ($) $ / shares shares	Jun. 20, 2022 $ / shares	Jun. 20, 2021 $ / shares	Dec. 31, 2023 USD ($) item $ / shares shares	Dec. 31, 2022 USD ($) $ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares	Jun. 21, 2023 shares
EARNINGS PER SHARE
Net income | $			$ 31,382			$ 82,313	$ 116,042	$ 39,759
Forfeitable Dividends Declared on Unvested Stock Based Awards | $						$ 729
Weighted average shares used to compute basic EPS (in shares)			44,344,000				44,164,000	43,964,000
Weighted average shares used to compute diluted EPS (in shares)			44,752,000				44,702,000	44,257,000
Basic (in dollars per share) | $ / shares			$ 0.71	$ 2.63	$ 0.90	$ 1.77	$ 2.63	$ 0.90
Diluted (in dollars per share) | $ / shares			$ 0.70	$ 2.60	$ 0.90	$ 1.73	$ 2.60	$ 0.90
Ratio of participation in earnings for common stock and preferred stock	1
Share in dividends for unvested restricted stock awards with common shares | item						1
Restricted Stock Units
EARNINGS PER SHARE
Antidilutive shares			684,151
Performance Stock Units
EARNINGS PER SHARE
Antidilutive shares			248,706
Employee Stock Option [Member]
EARNINGS PER SHARE
Dilutive effect of stock-based awards (in shares)			381,000				532,000	293,000
Restricted Stock Units
EARNINGS PER SHARE
Dilutive effect of stock-based awards (in shares)							6,000
Performance Stock Units
EARNINGS PER SHARE
Dilutive effect of stock-based awards (in shares)			27,000
Antidilutive shares							248,706
Class A Common Stock
EARNINGS PER SHARE
Net income | $		$ 44,663
Weighted average shares used to compute diluted EPS (in shares)		43,190,000
Basic (in dollars per share) | $ / shares		$ 1.06
Diluted (in dollars per share) | $ / shares		$ 1.03
Class A Common Stock | Employee Stock Option [Member]
EARNINGS PER SHARE
Weighted average shares used to compute basic EPS (in shares)		42,115,000
Dilutive effect of stock-based awards (in shares)		482,000
Class A Common Stock | Restricted Stock
EARNINGS PER SHARE
Unvested restricted stock		1,708,354				1,708,354	3,145,957	3,741,770
Class A Common Stock | Restricted Stock Units
EARNINGS PER SHARE
Dilutive effect of stock-based awards (in shares)		157,000
Unvested restricted stock		601,248				601,248	165,803
Class A Common Stock | Performance Stock Units
EARNINGS PER SHARE
Dilutive effect of stock-based awards (in shares)		436,000
Unvested restricted stock		767,054				767,054	248,706
Class B Common Stock
EARNINGS PER SHARE
Net income | $		$ 3,498
Weighted average shares used to compute diluted EPS (in shares)		8,698,000
Basic (in dollars per share) | $ / shares		$ 0.42
Diluted (in dollars per share) | $ / shares		$ 0.40
Class B Common Stock | Employee Stock Option [Member]
EARNINGS PER SHARE
Weighted average shares used to compute basic EPS (in shares)		8,428,000
Dilutive effect of stock-based awards (in shares)		111,000
Class B Common Stock | Restricted Stock
EARNINGS PER SHARE
Unvested restricted stock		341,683				341,683			680,718
Class B Common Stock | Restricted Stock Units
EARNINGS PER SHARE
Dilutive effect of stock-based awards (in shares)		48,000
Unvested restricted stock		120,241				120,241			136,819
Class B Common Stock | Performance Stock Units
EARNINGS PER SHARE
Dilutive effect of stock-based awards (in shares)		111,000
Unvested restricted stock		153,404				153,404			153,404
Class A Restricted Stock | Restricted Stock
EARNINGS PER SHARE
Net income | $		$ 1,897
Class B Restricted Stock | Restricted Stock
EARNINGS PER SHARE
Net income | $						$ 144