Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Basic EPS:
Net Income (Loss)	$ (35,943)	$ (19,951)	$ 28,380	$ (6,896)	$ (305,976)	$ (5,858)	$ (27,514)	$ (318,730)
Income, share amounts	12,629			11,935			12,283	11,890
Earnings Per Share, Basic	$ (2.85)			$ (0.58)			$ (2.24)	$ (26.81)
Dilutive Securities:
Dilutive RSUs	0			0			0	0
Diluted EPS:
Net Income (Loss) Available to Common Stockholders, Diluted	$ (35,943)			$ (6,896)			$ (27,514)	$ (318,730)
Weighted Average Number of Shares Outstanding, Diluted	12,629			11,935			12,283	11,890
Earnings Per Share, Diluted	$ (2.85)			$ (0.58)			$ (2.24)	$ (26.81)
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	0			200			100	200
Performance Shares [Member]
Earnings Per Share (Textual)
Antidilutive shares excluded from EPS, shares	0			100			0	100