CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock, Par Value	Common Stock, Capital in excess of par value	Retained Earnings (Accum. Deficit)	Accum. Other Comp. Loss	Non-controlling Interest	Cumulative Effect Adjustment	Cumulative Effect Adjustment Retained Earnings (Accum. Deficit)
Common stock, shares outstanding, beginning of period (in shares) at Dec. 31, 2018		77,353
Beginning balance at Dec. 31, 2018	$ 975,983	$ 774	$ 960,773	$ 54,884	$ (42,906)	$ 2,458	$ 0
Net income (loss)	19,938			19,656		282
Other comprehensive income (loss)	1,189				1,189
Stock-based compensation (in shares)		39
Stock-based compensation	2,285		2,285
Taxes withheld on issuance of stock-based awards	(719)		(719)
Other	14					14
Common stock, shares outstanding, end of period (in shares) at Mar. 31, 2019		77,392
Ending balance at Mar. 31, 2019	$ 998,690	$ 774	962,339	74,540	(41,717)	2,754
Common stock, shares outstanding, beginning of period (in shares) at Dec. 31, 2019	77,500	77,460
Beginning balance at Dec. 31, 2019	$ 1,036,214	$ 775	969,174	107,048	(44,037)	3,254	$ (1,573)	$ (1,573)
Net income (loss)	(633,455)			(633,728)		273
Other comprehensive income (loss)	(10,953)				(10,953)
Stock-based compensation (in shares)		44
Stock-based compensation	2,429		2,429
Taxes withheld on issuance of stock-based awards	$ (368)		(368)
Common stock, shares outstanding, end of period (in shares) at Mar. 31, 2020	77,500	77,504
Ending balance at Mar. 31, 2020	$ 392,294	$ 775	$ 971,235	$ (528,253)	$ (54,990)	$ 3,527