SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Tables)

12 Months Ended

Dec. 31, 2019

Schedule of Selected Quarterly Financial Information

Selected quarterly financial information for each of the quarters in the years ended December 31, 2019 and 2018 is as follows (in thousands, except per share data):

	March 31, 2019		June 30, 2019		September 30, 2019		December 31, 2019
Revenue	$	484,064	$	490,294	$	508,522	$	497,809
Operating income		73,264		70,954		71,095		66,251
Net income		49,340		48,578		48,994		41,974
Basic earnings per share:
Net income	$	0.42	$	0.41	$	0.41	$	0.35
Diluted earnings per share:
Net income	$	0.41	$	0.41	$	0.41	$	0.35

	March 31, 2018		June 30, 2018		September 30, 2018		December 31, 2018
Revenue	$	440,916	$	449,929	$	462,728	$	482,193
Operating income		58,705		61,712		64,419		64,649
Net income		37,777		39,197		40,994		41,239
Basic earnings per share:
Net income	$	0.32	$	0.33	$	0.35	$	0.35
Diluted earnings per share:
Net income	$	0.32	$	0.33	$	0.34	$	0.35