UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Contributed Capital	Retained Earnings
Beginning balance at Dec. 31, 2017	$ 147,119	$ 422	$ 11,693	$ 135,004
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	1,138			1,138
Dividends declared:
Common stock, $0.22/share	(928)			(928)
Ending balance at Mar. 31, 2018	147,329	422	11,693	135,214
Beginning balance at Dec. 31, 2018	146,598	422	11,948	134,228
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	4,908			4,908
Stock-based compensation expense	123		123
Dividends declared:
Common stock, $0.22/share	(928)			(928)
Awards under LTIP, $0.22/share	(2)			(2)
Ending balance at Mar. 31, 2019	$ 150,699	$ 422	$ 12,071	$ 138,206