Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Basic EPS:
Net Income (Loss)	$ 64,704	$ 16,053	$ 2,319	$ 8,466	$ 80,757	$ 10,787
Income, share amounts	11,746		11,655		11,727	11,629
Earnings Per Share, Basic	$ 5.51		$ 0.20		$ 6.89	$ 0.93
Dilutive Securities:
Dilutive RSAs	0		0		0	0
Dilutive RSUs	34		16		59	17
Dilutive Stock Options	0		86		0	96
Diluted EPS:
Net Income (Loss) Available to Common Stockholders, Diluted	$ 64,704		$ 2,319		$ 80,757	$ 10,787
Weighted Average Number of Shares Outstanding, Diluted	11,780		11,757		11,786	11,742
Earnings Per Share, Diluted	$ 5.49		$ 0.20		$ 6.85	$ 0.92
Warrant [Member]
Earnings Per Share (Textual)
Antidilutive shares excluded from EPS, shares	2,100		4,300		2,100	4,300
Stock Options [Member]
Earnings Per Share (Textual)
Antidilutive shares excluded from EPS, shares	500		400		600	400
Restricted Stock Units (RSUs) [Member]
Earnings Per Share (Textual)
Antidilutive shares excluded from EPS, shares	200		100		100	100
Performance Shares [Member]
Earnings Per Share (Textual)
Antidilutive shares excluded from EPS, shares	100		100		100	100