Earning Per Common Share - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Numerator for basic and diluted earnings (loss) per common share:
Net income (loss)	$ 523	$ 9,564	$ (1,343)	$ 13,254
Denominator:
Weighted average shares outstanding (in shares)	10,557,000	10,420,000	10,518,000	10,399,000
Denominator for basic earnings per common share (in shares)	10,557,000	10,420,000	10,518,000	10,399,000
Effect of dilutive securities:
Other stock compensation plans (in shares)	66,000	222,000	0	199,000
Dilutive potential common shares (in shares)	66,000	222,000	0	199,000
Denominator for diluted earnings (loss) per common share - adjusted weighted average shares outstanding (in shares)	10,623,000	10,642,000	10,518,000	10,598,000
Basic earnings per common share (usd per share)	$ 0.05	$ 0.92	$ (0.13)	$ 1.27
Diluted earnings per common share (usd per share)	$ 0.05	$ 0.90	$ (0.13)	$ 1.25
Anti-dilutive shares (in shares)	0		131,000	0