Unaudited Selected Quarterly Results of Operations

12 Months Ended

Dec. 31, 2011

Unaudited Selected Quarterly Results of Operations [Abstract]

Quarterly Financial Information [Text Block]

UNAUDITED SELECTED QUARTERLY RESULTS OF OPERATIONS

Summarized below is our unaudited quarterly financial data for the quarters ended December 31, 2011 and 2010 (in thousands, except per share data).

	Quarter ended 2011
	December 31		September 30		June 30			March 31
Services and product sales revenue	$	243,786	$	231,344	$	225,785		$	206,733
Cost of services and product sales	154,034		150,312		152,273			136,750
Other operating expenses	16,864		17,468		15,709			13,484
Operating income	72,888		63,564		57,803			56,499
Interest expense and loss on exchange of Notes	2,358		3,856		2,709			2,989
Income before income tax expense	70,530		59,708		55,094			53,510
Income tax expense	17,371		14,599		14,710			7,518
Net income	53,159		45,109		40,384			45,992
Net income (loss) attributable to non-controlling interest	83		242		(67		)	(298		)
Net income attributable to Core Laboratories N.V.	$	53,076	$	44,867	$	40,451		$	46,290
Per share information:
Basic earnings per share	$	1.12	$	0.96	$	0.88		$	1.02
Diluted earnings per share (1)	$	1.11	$	0.93	$	0.83		$	0.94
Weighted average common shares outstanding:
Basic	47,343		46,606		45,945			45,225
Diluted	47,677		48,030		48,662			49,141

	Quarter ended 2010
	December 31		September 30		June 30		March 31
Services and product sales revenue	$	208,193	$	199,221	$	198,902	$	188,337
Cost of services and product sales	133,513		125,772		128,917		125,588
Other operating expenses	13,104		13,232		16,265		11,336
Operating income	61,576		60,217		53,720		51,413
Interest expense	4,915		4,690		4,114		4,059
Income before income tax expense	56,661		55,527		49,606		47,354
Income tax expense	16,671		16,764		15,244		15,068
Net income	39,990		38,763		34,362		32,286
Net income attributable to non-controlling interest	48		209		146		81
Net income attributable to Core Laboratories N.V.	$	39,942	$	38,554	$	34,216	$	32,205
Per share information:
Basic earnings per share	$	0.89	$	0.86	$	0.77	$	0.72
Diluted earnings per share (1)	$	0.81	$	0.79	$	0.71	$	0.69
Weighted average common shares outstanding:
Basic	45,093		44,736		44,651		44,836
Diluted	49,195		48,955		47,957		46,820

(1) The sum of the individual quarterly diluted earnings per share amounts may not agree with the year-to-date diluted earnings per share amounts as each quarterly computation is based on the weighted average number of diluted common shares outstanding during that period.