Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ 8,217	$ (5,675)	$ 16,424	$ (114,013)
Gain (loss) on fair value of interest rate swaps	(2,910)	(461)	(3,208)	(2,790)
Interest rate swap amount reclassified to net income (loss)	0	176	341	(223)
Income tax expense (benefit) on interest rate swaps reclassified to net income (loss)	(633)	166	(611)	(539)
Total interest rate swaps	(2,277)	(119)	(2,938)	(2,028)
Total other comprehensive income (loss)	(2,277)	(119)	(2,938)	(2,028)
Comprehensive income (loss)	5,940	(5,794)	13,486	(116,041)
Comprehensive income (loss) attributable to non-controlling interest	157	41	259	124
Comprehensive income (loss) attributable to Core Laboratories N.V.	$ 5,783	$ (5,835)	$ 13,227	$ (116,165)