UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Contributed Capital	Retained Earnings
Beginning balance at Dec. 31, 2019	$ 151,641	$ 423	$ 12,778	$ 138,440
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings (losses)	(11,427)			(11,427)
Stock-based compensation expense	134		134
Dividends declared:
Common stock	(1,016)			(1,016)
Awards under LTIP	(6)			(6)
Ending balance at Mar. 31, 2020	139,326	423	12,912	125,991
Beginning balance at Dec. 31, 2020	149,092	423	13,340	135,329
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings (losses)	2,808			2,808
Stock-based compensation expense	185		185
Cancellation of shares withheld to cover taxes upon vesting	(31)		(31)
Dividends declared:
Common stock	(1,019)			(1,019)
Awards under LTIP	(18)			(18)
Ending balance at Mar. 31, 2021	$ 151,017	$ 423	$ 13,494	$ 137,100