Earnings per Share/Capital Stock: (Tables)

9 Months Ended

Sep. 30, 2017

Earnings Per Share [Abstract]

Schedule of reconciliation of Registrant's net income and weighted average Common Shares outstanding for calculating basic net income per share

Basic:	For The Three Months Ended September 30,				For The Nine Months Ended   September 30,
(in thousands, except per share amounts)	2017		2016		2017		2016
Net income	$	21,006	$	21,639	56,499		48,531
Less: (a) Distributed earnings to common shareholders	9,349		8,189		27,064		24,558
Distributed earnings to participating securities	50		48		139		141
Undistributed earnings	11,607		13,402		29,296		23,832
(b) Undistributed earnings allocated to common shareholders	11,546		13,323		29,147		23,696
Undistributed earnings allocated to participating securities	61		79		149		136
Total income available to common shareholders, basic (a)+(b)	$	20,895	$	21,512	$	56,211	$	48,254
Weighted average Common Shares outstanding, basic	36,659		36,561		36,625		36,546
Basic earnings per Common Share	$	0.57	$	0.59	$	1.53	$	1.32

Schedule of reconciliation of Registrant's net income and weighted average Common Shares outstanding for calculating diluted net income per share

The following is a reconciliation of Registrant’s net income and weighted average Common Shares outstanding for calculating diluted net income per share:

Diluted:	For The Three Months Ended September 30,				For The Nine Months Ended   September 30,
(in thousands, except per share amounts)	2017		2016		2017		2016
Common shareholders earnings, basic	$	20,895	$	21,512	$	56,211	$	48,254
Undistributed earnings for dilutive stock-based awards	61		79		149		136
Total common shareholders earnings, diluted	$	20,956	$	21,591	$	56,360	$	48,390
Weighted average common shares outstanding, basic	36,659		36,561		36,625		36,546
Stock-based compensation (1)	197		201		188		197
Weighted average common shares outstanding, diluted	36,856		36,762		36,813		36,743
Diluted earnings per Common Share	$	0.57	$	0.59	$	1.53	$	1.32

(1)       In applying the treasury stock method of reflecting the dilutive effect of outstanding stock-based compensation in the calculation of diluted EPS, 70,702 and 138,060 stock options at September 30, 2017 and 2016, respectively, were deemed to be outstanding in accordance with accounting guidance on earnings per share.  All of the 195,457 and 216,733 restricted stock units at September 30, 2017 and 2016, respectively, were included in the calculation of diluted EPS for the three and nine months ended September 30, 2017 and 2016.