Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 40,557	$ 23,577
Changes in fair value of interest rate swaps	(372)	646
Interest rate swap amounts reclassified to interest expense	(49)	64
Income taxes on derivatives	89	(150)
Total derivatives	(332)	560
Prior service cost	(25)	(21)
Unrecognized net actuarial loss	15	84
Income taxes on pension and other postretirement benefit plans	3	(15)
Total pension and other postretirement benefit plans	(7)	48
Total other comprehensive income (loss)	(339)	608
Comprehensive income	40,218	24,185
Net income attributable to non-controlling interest	47	50
Comprehensive income attributable to Core Laboratories N.V.	$ 40,171	$ 24,135

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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