Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020
Basic EPS:
Net Income (Loss)	$ (19,951)	$ 28,380	$ (305,976)	$ (5,858)	$ 8,429	$ (311,834)
Income, share amounts	12,190		11,910		12,110	11,868
Earnings Per Share, Basic	$ (1.64)		$ (25.69)		$ 0.70	$ (26.28)
Dilutive Securities:
Dilutive RSUs	0		0		269	0
Diluted EPS:
Net Income (Loss) Available to Common Stockholders, Diluted	$ (19,951)		$ (305,976)		$ 8,429	$ (311,834)
Weighted Average Number of Shares Outstanding, Diluted	12,190		11,910		12,379	11,868
Earnings Per Share, Diluted	$ (1.64)		$ (25.69)		$ 0.68	$ (26.28)
Stock Options [Member]
Earnings Per Share (Textual)
Antidilutive shares excluded from EPS, shares	300		300		300	300
Restricted Stock Units (RSUs) [Member]
Earnings Per Share (Textual)
Antidilutive shares excluded from EPS, shares	100		200		100	200
Performance Shares [Member]
Earnings Per Share (Textual)
Antidilutive shares excluded from EPS, shares	0		100		100	100