Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ 14,238	$ (22,628)	$ (38,981)	$ 30,105
OTHER COMPREHENSIVE INCOME:
Reclassification of actuarial loss on defined benefit pension plan included in net income (loss)	24	35	48	70
Other comprehensive income before taxes	24	35	48	70
INCOME TAX PROVISION RELATED TO OTHER COMPREHENSIVE INCOME	0	0	0	0
OTHER COMPREHENSIVE INCOME—Net of tax	24	35	48	70
COMPREHENSIVE INCOME (LOSS)	14,262	(22,593)	(38,933)	30,175
LESS COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO NONCONTROLLING INTERESTS	7,615	(12,103)	(20,789)	16,835
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO THE COMPANY	$ 6,647	$ (10,490)	$ (18,144)	$ 13,340