Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2020

Accounting Policies [Abstract]

Schedule of Property, Plant and Equipment, Useful life

We estimate the useful lives and salvage values of our assets based on historical data as follows:

Buildings and leasehold improvements	3 - 40 years
Machinery and equipment	3 - 10 years

Schedule of Other Assets

Other assets consist of the following (in thousands):

	December 31,
	2020		2019
Cash surrender value of life insurance policies	$	31,201	$	47,195
Investments in unconsolidated affiliates		4,094		3,969
Other		4,955		4,882
Total other assets	$	40,250	$	56,046

Schedule of Weighted Average Number of Shares

The following table summarizes the calculation of weighted average common shares outstanding used in the computation of basic and diluted earnings per share (in thousands):

	For the Years Ended December 31,
	2020		2019		2018
Weighted average common shares outstanding - basic		44,477		44,357		44,206
Effect of dilutive securities:
Performance shares		—		242		221
Restricted stock		—		47		47
Weighted average common shares outstanding - assuming dilution		44,477		44,646		44,474

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

For the year ended December 31, 2020, the number of outstanding performance shares and restricted shares of Core Laboratories N.V. common stock that were excluded from diluted earnings per share calculation, as their impact would be antidilutive, were as follows (in thousands):

	December 31, 2020
Performance shares		308
Restricted Stock		189