Note 13 - Preferred Stock and Common Stock (Tables)

6 Months Ended

Jun. 30, 2018

Notes Tables

Schedule of Stockholders Equity [Table Text Block]

As of June 30 , 2018
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 I		18,400		7,000	$	175,000		6.000	%	$	1.50000	$	1.00	3/20/2017
Class J		9,000		9,000		225,000		5.500	%	$	1.37500	$	1.00	7/25/2017
Class K		8,050		7,000		175,000		5.625	%	$	1.40625	$	1.00	12/7/2017
Class L		10,350		9,000		225,000		5.125	%	$	1.28125	$	1.00	8/16/2022
Class M (1)		10,580		10,580		264,500		5.250	%	$	1.31250	$	1.00	12/20/2022
				42,580	$	1,064,500

As of December 31, 2017
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 I		18,400		7,000	$	175,000		6.000	%	$	1.50000	$	1.00	3/20/2017
Class J		9,000		9,000		225,000		5.500	%	$	1.37500	$	1.00	7/25/2017
Class K		8,050		7,000		175,000		5.625	%	$	1.40625	$	1.00	12/7/2017
Class L		10,350		9,000		225,000		5.125	%	$	1.28125	$	1.00	8/16/2022
Class M		10,580		9,200		230,000		5.250	%	$	1.31250	$	1.00	12/20/2022
				41,200	$	1,030,000