Earnings Per Share (Schedule of Calculation of Numerator and Denominator in Earnings Per Share) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Earnings Per Share [Abstract]
Net income (loss)	$ 51,464,000	$ (6,009,000)	$ 52,717,000	$ (8,107,000)
Preferred stock dividends	(2,688,000)	(2,688,000)	(5,376,000)	(5,376,000)
Net (income) attributable to noncontrolling interests	(409,000)	(88,000)	(550,000)	(236,000)
Net earnings allocated to unvested shares	(1,878,000)	(28,000)	(1,850,000)	(182,000)
Net (loss) attributable to vested common shares	$ 46,489,000	$ (8,813,000)	$ 44,941,000	$ (13,901,000)
Weighted average number of vested common shares outstanding, basic and diluted	13,197,000	13,107,000	13,171,000	13,097,000
NET INCOME (LOSS) PER COMMON SHARE ATTRIBUTABLE TO COMMON SHAREHOLDERS (BASIC AND DILUTED):	$ 3.52	$ (0.67)	$ 3.41	$ (1.06)