BASIS OF PRESENTATION (Schedule Of Preferred Stock) (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Class of Stock
Shares outstanding (in shares)	14,703,214		14,703,214
Series C Preferred Shares
Class of Stock
Shares outstanding (in shares)	3,000,000		3,000,000
Aggregate Liquidation Preference	$ 75,000
Dividend Rate (percentage)	6.875%
Dividend per share (in dollars per share)	$ 2.5782	$ 0
Series D Preferred Shares
Class of Stock
Shares outstanding (in shares)	7,701,700		7,701,700
Aggregate Liquidation Preference	$ 192,500
Dividend Rate (percentage)	6.50%
Dividend per share (in dollars per share)	$ 2.4378	0
Series E Preferred Shares
Class of Stock
Shares outstanding (in shares)	4,001,514		4,001,514
Aggregate Liquidation Preference	$ 100,000
Dividend Rate (percentage)	6.50%
Dividend per share (in dollars per share)	$ 2.4378	$ 0