Consolidated Statement of Other Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Net income	$ 21,053	$ 16,838	$ 61,444	$ 48,490
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	(47)	199	(244)	(2,221)
Interest rate swap amounts reclassified to interest expense	112	207	419	631
Income taxes on derivatives	(23)	(150)	(61)	585
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	42	256	114	(1,005)
Amortization to net income of prior service cost	20	20	58	58
Amortization to net income of actuarial loss	110	148	330	444
Income taxes on pension and other postretirement benefit plans	(22)	(32)	(68)	(96)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	68	96	204	290
Other Comprehensive Income (Loss), Net of Tax	110	352	318	(715)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Comprehensive income	21,163	17,190	61,762	47,775
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	(33)	108		54
Comprehensive income attributable to Core Laboratories N.V.	$ 21,196	$ 17,082	$ 61,752	$ 47,721