Note 14 - Net Income Attributable to Controlling Interests Per Common Share - Summary of Earning Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
Net income attributable to controlling interests		$ 94,120	$ 26,443
Preferred stock and preferred unit dividends and accretion		(17,070)	(1,153)
Net income attributable to common shareholders—basic		77,050	25,290
Effect of dilutive preferred stock dividends and accretion		2,400	26
Net income attributable to common shareholders—diluted		$ 79,450	$ 25,316
Basic (including unvested share-based payment awards) (1) (in shares)	[1]	14,486	14,499
Effect of dilutive stock compensation arrangements and exchange of preferred stock (in shares)		5,616	774
Diluted (including unvested share-based payment awards) (1) (in shares)	[1]	20,102	15,273
Net income attributable to common shareholders per common share—basic (in dollars per share)		$ 5.32	$ 1.74
Net income attributable to common shareholders per common share—diluted (in dollars per share)		$ 3.95	$ 1.66

[1] Shares related to unvested share-based payment awards included in our basic and diluted share counts were 431,262 for the year ended December 31, 2020, compared to 512,636 for the year ended December 31, 2019.