Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Basic EPS:
Net Income (Loss)	$ (6,896)	$ (305,976)	$ (5,858)	$ 27,651	$ 64,704	$ 16,053	$ (318,730)	$ 108,408
Income, share amounts	11,935			11,762			11,890	11,739
Earnings Per Share, Basic	$ (0.58)			$ 2.35			$ (26.81)	$ 9.24
Dilutive Securities:
Dilutive RSUs	0			18			0	37
Diluted EPS:
Net Income (Loss) Available to Common Stockholders, Diluted	$ (6,896)			$ 27,651			$ (318,730)	$ 108,408
Weighted Average Number of Shares Outstanding, Diluted	11,935			11,780			11,890	11,776
Earnings Per Share, Diluted	$ (0.58)			$ 2.35			$ (26.81)	$ 9.21
Warrant [Member]
Earnings Per Share (Textual)
Antidilutive shares excluded from EPS, shares	0			2,100			0	2,100
Stock Options [Member]
Earnings Per Share (Textual)
Antidilutive shares excluded from EPS, shares	300			400			300	500
Restricted Stock Units (RSUs) [Member]
Earnings Per Share (Textual)
Antidilutive shares excluded from EPS, shares	200			400			200	100
Performance Shares [Member]
Earnings Per Share (Textual)
Antidilutive shares excluded from EPS, shares	100			100			100	100