Note 11 - Subsequent Events (Details Textual) - USD ($) $ / shares in Units, $ in Thousands				3 Months Ended
	May 09, 2023	Apr. 04, 2023	Apr. 03, 2023	Mar. 31, 2023	Mar. 31, 2022
Dividends, Common Stock, Total				$ 6,732	$ 6,727
Repayments of Long-Term Debt				$ 42,814	$ 39,058
Subsequent Event [Member]
Dividends, Common Stock, Total	$ 6,700
Common Stock, Dividends, Per Share, Declared (in dollars per share)	$ 0.12
Dividends Payable, Date of Record	May 23, 2023
Dividends Payable, Date to be Paid	Jun. 06, 2023
Subsequent Event [Member] | Plumstriker Loan Agreement [Member]
Repayments of Long-Term Debt		$ 11,100
Subsequent Event [Member] | Goldman Sachs & Co. LLC [Member]
Stock Issued During Period, Shares, New Issues (in shares)			540,000
Shares Issued, Price Per Share (in dollars per share)			$ 82.60