Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2021

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)	2021		2020		2019
Numerator:
Net income	$	153,945	$	127,923	$	102,700
Denominator:
Weighted-average common shares outstanding	16,291,016		16,302,825		16,234,342
Effect of dilutive PBRSUs and TBRSUs	134,190		104,677		95,114
Weighted-average common shares outstanding adjusted for the effect of dilutive PBRSUs and TBRSUs	16,425,206		16,407,502		16,329,456
Earnings per common share:
Basic earnings per common share	$	9.45	$	7.85	$	6.33
Diluted earnings per common share	$	9.37	$	7.80	$	6.29