Selected Quarterly Financial Data (unaudited)

12 Months Ended

Dec. 31, 2019

Quarterly Financial Information Disclosure [Abstract]

Selected Quarterly Financial Data (unadudited)

Selected Quarterly Financial Data (unaudited)

The following table presents selected quarterly financial data:

	Quarter
(in thousands, except per share data)	1st		2nd		3rd		4th		Total
2019
Revenue	$	94,226	$	101,792	$	104,965	$	109,847	$	410,830
Operating income	35,435		38,104		40,133		46,462		160,134
Net income attributable to common stockholders	32,543		31,333		34,017		36,728		134,621
Earnings per share attributable to common stockholders:
Basic	0.69		0.66		0.72		0.78		2.85
Diluted	0.68		0.65		0.70		0.75		2.79
Weighted-average shares outstanding:
Basic	47,146		47,304		47,316		47,324		47,273
Diluted	47,642		48,175		48,412		48,703		48,297
2018
Revenue	$	94,464	$	94,410	$	98,331	$	93,906	$	381,111
Operating income	37,219		36,287		39,223		34,309		147,038
Net income attributable to common stockholders	27,586		29,959		30,790		25,561		113,896
Earnings per share attributable to common stockholders:
Basic	0.59		0.64		0.66		0.55		2.43
Diluted	0.59		0.63		0.65		0.54		2.40
Weighted-average shares outstanding:
Basic	46,683		46,819		46,830		46,842		46,794
Diluted	47,152		47,311		47,524		47,562		47,381