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Note 13 - Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2018

Notes Tables

Schedule of Stockholders Equity [Table Text Block]

As of September 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

Dividends Declared [Table Text Block]

		Nine Months Ended September 30,
		2018				2017
Common Shares		$	0.84000			$	0.81000
Class I Depositary Shares		$	1.12500			$	1.12500
Class I Depositary Shares Redeemed		$	-			$	0.96250
Class J Depositary Shares		$	1.03125			$	1.03125
Class K Depositary Shares		$	1.05468			$	1.05468
Class L Depositary Shares		$	0.96093			$	0.16016
Class M Depositary Shares		$	0.98439			$	-

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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644

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