Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Consolidated net income (loss)	$ (28,005)	$ (41,597)	$ 46,082
Other comprehensive income – net gain arising during the period on defined benefit pension plans	659	2,106	3,594
Total comprehensive income (loss)	$ (27,346)	$ (39,491)	$ 49,676