Note 15 - Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2021

Notes Tables

Schedule of Stockholders Equity [Table Text Block]

As of June 30, 2021 and December 31, 2020
Class of Preferred Stock	Shares Authorized		Shares Issued and Outstanding		Liquidation Preference (in thousands)		Dividend Rate			Annual Dividend per Depositary Share		Par Value		Optional Redemption Date
Class L		10,350		9,000	$	225,000		5.125	%	$	1.28125	$	1.00	8/16/2022
Class M		10,580		10,580		264,500		5.250	%	$	1.31250	$	1.00	12/20/2022
				19,580	$	489,500

Dividends Declared [Table Text Block]

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
Common Shares	$	0.17000	$	-	$	0.34000	$	0.28000
Class L Depositary Shares	$	0.32031	$	0.32031	$	0.64062	$	0.64062
Class M Depositary Shares	$	0.32813	$	0.32813	$	0.65626	$	0.65626