Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Basic EPS:
Net Income (Loss)	$ 27,651	$ 64,704	$ 16,053	$ 7,080	$ 2,321	$ 8,466	$ 108,408	$ 17,867
Income, share amounts	11,762			11,671			11,739	11,643
Earnings Per Share, Basic	$ 2.35			$ 0.61			$ 9.24	$ 1.53
Dilutive Securities:
Dilutive RSUs	18			103			37	99
Dilutive Stock Options	0			18			0	17
Diluted EPS:
Net Income (Loss) Available to Common Stockholders, Diluted	$ 27,651			$ 7,080			$ 108,408	$ 17,867
Weighted Average Number of Shares Outstanding, Diluted	11,780			11,792			11,776	11,759
Earnings Per Share, Diluted	$ 2.35			$ 0.60			$ 9.21	$ 1.52
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	400			500			500	400
Restricted Stock Units (RSUs) [Member]
Earnings Per Share (Textual)
Antidilutive shares excluded from EPS, shares	400			100			100	100
Performance Shares [Member]
Earnings Per Share (Textual)
Antidilutive shares excluded from EPS, shares	100			100			100	100