Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock
Beginning balance at Dec. 31, 2021	$ 542,762	$ 544	$ 64,779	$ 705,600	$ (80,304)	$ (147,857)
Increase (Decrease) in Stockholders' Equity
Net loss	(108,327)			(108,327)
Other comprehensive income	(11,120)				(11,120)
Comprehensive (loss) income	(119,447)
Cash dividends declared	(6,261)			(6,261)
Share-based compensation expense	909		909
Delivery of treasury shares:
RSUs and PSAs	(1,230)		(3,815)			2,585
Ending balance at Mar. 31, 2022	416,733	544	61,873	591,012	(91,424)	(145,272)
Beginning balance at Dec. 31, 2022	318,004	544	60,663	498,863	(97,895)	(144,171)
Increase (Decrease) in Stockholders' Equity
Net loss	(13,584)			(13,584)
Other comprehensive income	7,472				7,472
Comprehensive (loss) income	(6,112)
Share-based compensation expense	931		931
Delivery of treasury shares:
RSUs and PSAs	(236)		(2,338)			2,102
Ending balance at Mar. 31, 2023	$ 312,587	$ 544	$ 59,256	$ 485,279	$ (90,423)	$ (142,069)