Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Basic EPS:
Net Income (Loss)	$ (305,976)	$ (5,858)	$ 64,704	$ 16,053	$ (311,834)	$ 80,757
Income, share amounts	11,910		11,746		11,868	11,727
Earnings Per Share, Basic	$ (25.69)		$ 5.51		$ (26.28)	$ 6.89
Dilutive Securities:
Dilutive RSUs	0		34		0	59
Diluted EPS:
Net Income (Loss) Available to Common Stockholders, Diluted	$ (305,976)		$ 64,704		$ (311,834)	$ 80,757
Weighted Average Number of Shares Outstanding, Diluted	11,910		11,780		11,868	11,786
Earnings Per Share, Diluted	$ (25.69)		$ 5.49		$ (26.28)	$ 6.85
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		500		300	600
Restricted Stock Units (RSUs) [Member]
Earnings Per Share (Textual)
Antidilutive shares excluded from EPS, shares	200		200		200	100
Performance Shares [Member]
Earnings Per Share (Textual)
Antidilutive shares excluded from EPS, shares	100		100		100	100