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)	$ 38,775	$ 58,867	$ 153,488
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	7,607	(5,668)	(13,747)
Benefit plans	0	0	301
Total other comprehensive income (loss), net of tax	7,607	(5,668)	(13,446)
Comprehensive income (loss)	46,382	53,199	140,042
Less: Comprehensive income (loss) attributable to noncontrolling interest in subsidiaries, net of tax	3,268	9,370	27,653
Comprehensive income (loss) attributable to common stockholders	$ 43,114	$ 43,829	$ 112,389