Earnings Per Share (Information Related to EPS Calculation) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Net income (loss)
Net income (loss)	$ (19,141)	$ 21,432	$ (41,768)	$ 23,603
Net (income) loss attributable to noncontrolling interests	(2)	132	(120)	83
Net income (loss) attributable to common stockholders, basic	(19,143)	21,564	(41,888)	23,686
Net income (loss) attributable to common stockholders, diluted	$ (19,143)	$ 21,564	$ (41,888)	$ 23,686
Shares
Weighted-average common shares outstanding - basic (in shares)	49,581,000	50,786,000	49,518,000	51,612,000
Restricted stock and stock options (in shares)	0	36,000	0	39,000
Weighted-average common shares outstanding - diluted (in shares)	49,581,000	50,822,000	49,518,000	51,651,000
Net income (loss) per common share
Basic income (loss) per share (in dollars per share)	$ (0.39)	$ 0.42	$ (0.85)	$ 0.46
Diluted income (loss) per share (in dollars per share)	$ (0.39)	$ 0.42	$ (0.85)	$ 0.46
Restricted stock and stock options
Anti-dilutive shares excluded from diluted EPS
Anti-dilutive shares excluded from diluted EPS (in shares)	735,000	577,000	735,000	580,000
Warrants
Anti-dilutive shares excluded from diluted EPS
Anti-dilutive shares excluded from diluted EPS (in shares)	88,000	2,103,000	88,000	2,103,000