Quarterly Financial Data (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Revenues	$ 451,142	$ 501,185	$ 470,427
Operating Income (Loss)	122,958	(56,888)	101,805
Net Income (Loss) Attributable to Parent	20,446	(177,788)	(7,244)
Net Income (Loss) Available to Common Stockholders, Basic	$ (133,486)	$ (338,901)	$ (121,033)
Earnings Per Share, Basic	$ (2.59)	$ (6.95)	$ (2.73)
Weighted Average Number of Shares Outstanding, Diluted	51,499,000	48,743,000	44,265,000
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 20,532	$ (181,603)	$ (7,458)