Earnings Per Share (Schedule Of Calculation Of Numerator And Denominator In Earnings Per Share) (Details) - USD ($)	3 Months Ended																12 Months Ended
	Dec. 31, 2016	[1]	Sep. 30, 2016	[1]	Jun. 30, 2016	[1]	Mar. 31, 2016	[1]	Dec. 31, 2015	[1]	Sep. 30, 2015	[1]	Jun. 30, 2015	[1]	Mar. 31, 2015	[1]	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Earnings Per Share [Abstract]
Income from continuing operations																	$ 8,764,000	$ 21,616,000	$ 17,611,000
Preferred stock dividends																	(14,408,000)	(14,408,000)	(14,408,000)
Net loss attributable to noncontrolling interests																	179,000	366,000	358,000
Net earnings allocated to unvested shares																	(715,000)	(701,000)	(734,000)
(Loss) income from continuing operations attributable to vested common shares																	(6,180,000)	6,873,000	2,827,000
Income from discontinued operations, net of noncontrolling interests, attributable to vested common shares																		164,000	11,012,000
Net (loss) income attributable to vested common shares outstanding																	$ (6,180,000)	$ 7,037,000	$ 13,839,000
Weighted average number of vested common shares outstanding																	81,672,000	81,356,000	75,311,000
Earnings per vested common share, basic and diluted
Continuing operations																	$ (0.08)	$ 0.09	$ 0.04
Discontinued operations																	0.00	0.00	0.14
Earnings (loss) per vested common share, basic and diluted	$ (0.01)		$ (0.05)		$ 0.01		$ (0.03)		$ 0.04		$ 0.03		$ 0.02		$ 0.00		$ (0.08)	$ 0.09	$ 0.18

[1] Differences between the sum of the four quarterly per share amounts and the annual per share amounts are attributable to the effect of the weighted average outstanding share calculations for the respective periods.