Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Note 11 - Subsequent Events (Details Textual) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended
	Aug. 02, 2023	Jul. 31, 2023	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022
Dividends, Common Stock			$ 7,229	$ 6,732	$ 6,731	$ 6,727
Common Stock, Dividends, Per Share, Declared (in dollars per share)			$ 0.12	$ 0.12
Subsequent Event [Member]
Dividends, Common Stock	$ 7,200
Common Stock, Dividends, Per Share, Declared (in dollars per share)	$ 0.12
Dividends Payable, Date of Record	Aug. 16, 2023
Dividends Payable, Date to be Paid	Aug. 30, 2023
Subsequent Event [Member] \| Northleaf Geothermal Holdings, Northleaf [Member]
Business Combination, Step Acquisition, Equity Interest in Acquiree, Percentage		36.75%
Business Combination, Consideration Transferred		$ 30,000
Subsequent Event [Member] \| ORPD LLC [Member]
Business Combination, Step Acquisition, Equity Interest in Acquiree, Percentage		63.25%