Earning Per Common Share - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Numerator for basic and diluted earnings per common share:
Income (loss) from continuing operations	$ 2,280	$ 16,578	$ 6,970	$ (5)	$ 30,201	$ 3,754	$ 10,098	$ 3,921	$ 25,823	$ 47,974	$ (30,586)
Loss from discontinued operations (Note 3)									(18,241)	(5,406)	(582)
Net income (loss)	$ 2,095	$ 6,830	$ 523	$ (1,866)	$ 26,250	$ 3,064	$ 9,564	$ 3,690	$ 7,582	$ 42,568	$ (31,168)
Denominator:
Weighted average shares outstanding (shares)									10,540	10,410	10,362
Denominator for basic earnings per common share (shares)									10,540	10,410	10,362
Effect of dilutive securities:
Other stock compensation plans (shares)									131	234	0
Dilutive potential common shares (shares)									131	234	0
Denominator for diluted earnings per common share - adjusted weighted average shares outstanding and assumed conversions (shares)									10,671	10,644	10,362
Basic earnings (loss) per common share from continuing operations (usd per share)	$ 0.22	$ 1.57	$ 0.66	$ (0.00)	$ 2.90	$ 0.36	$ 0.97	$ 0.38	$ 2.45	$ 4.61	$ (2.95)
Basic earnings (loss) per common share from discontinued operations (usd per share)									(1.73)	(0.52)	(0.06)
Basic earnings (earnings) per common share (usd per share)	0.20	0.65	0.05	(0.18)	2.52	0.29	0.92	0.36	0.72	4.09	(3.01)
Diluted earnings (loss) per common share from continuing operations (usd per share)	0.21	1.56	0.66	(0.00)	2.83	0.35	0.96	0.37	2.42	4.51	(2.95)
Diluted earnings (loss) per common share from discontinued operations (usd per share)									(1.71)	(0.51)	(0.06)
Diluted earnings (loss) per common share (usd per share)	$ 0.20	$ 0.64	$ 0.05	$ (0.18)	$ 2.46	$ 0.29	$ 0.90	$ 0.35	$ 0.71	$ 4.00	$ (3.01)
Anti-dilutive share, shares											117