Earnings Per Common Share (Tables)

6 Months Ended

Jun. 30, 2019

Earnings Per Share [Abstract]

Computation of Earnings Per Common Share

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in thousands, except per share data)	2019		2018		2019		2018
Numerator:
Net income to common shareholders	$	88,277	$	71,177	$	167,441	$	143,652
Net income allocated to participating securities - basic and diluted		1,502		1,328		2,839		2,694
Net income allocated to common shareholders - basic and diluted	$	86,775	$	69,849	$	164,602	$	140,958
Denominator:
Weighted-average common shares - basic		85,728		85,305	$	85,708	$	85,273
Dilutive potential common shares		107		178		102		178
Weighted-average common shares - diluted		85,835		85,483	$	85,810	$	85,451
Earnings per common share:
Basic	$	1.01	$	0.82	$	1.92	$	1.65
Diluted	$	1.01	$	0.82	$	1.92	$	1.65