Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2020

Earnings Per Share [Abstract]

Schedule of basic and diluted EPS calculations

The basic and diluted EPS calculations for the three and six months ended June 30, 2020 and 2019 are presented below:

	Three Months Ended June 30,				Six Months Ended June 30,
(in thousands, except per share amounts)	2020		2019		2020		2019
Income attributable to common stockholders	$	43,622	$	35,699	$	65,651	$	56,049
Weighted average common shares outstanding, basic	67,022		66,578		66,931		66,679
Effect of dilutive securities:
Restricted stock units (a)	454		390		562		403
Stock options	88		109		111		97
Weighted average common shares outstanding, diluted	67,564		67,077		67,604		67,179
Basic income per common share	$	0.65	$	0.54	$	0.98	$	0.84
Diluted income per common share	$	0.65	$	0.53	$	0.97	$	0.83

(a) Includes service-based and contingently issuable performance-based restricted stock units.

Schedule of anti-dilutive securities excluded from computation of earnings per share

The following table provides the securities that could potentially dilute EPS in the future, but were not included in the computation of diluted EPS for the periods presented because to do so would have been anti-dilutive. The amounts included in this table exclude performance-based restricted stock units. As of June 30, 2020, the number of currently outstanding performance-based restricted stock units that are issued upon vesting could range from zero to a maximum of 0.9 million.

	Three Months Ended June 30,		Six Months Ended June 30,
(in thousands)	2020	2019	2020	2019
Restricted stock units	46	59	46	59