Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2020

Earnings Per Share [Abstract]

Schedule of computation of basic and diluted earnings per common share

The following table sets forth the computation of basic and diluted earnings per common share:

Year ended December 31 (In thousands, except share data)	2020		2019		2018
Numerator:
Net income	$	127,923	$	102,700	$	110,387
Denominator:
Weighted-average common shares outstanding	16,302,825		16,234,342		15,488,982
Effect of dilutive PBRSUs and TBRSUs	104,677		95,114		122,507
Weighted-average common shares outstanding adjusted for the effect of dilutive PBRSUs and TBRSUs	16,407,502		16,329,456		15,611,489
Earnings per common share:
Basic earnings per common share	$	7.85	$	6.33	$	7.13
Diluted earnings per common share	$	7.80	$	6.29	$	7.07