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Earnings per Share/Capital Stock: (Tables) | 3 Months Ended
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Mar. 31, 2019
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 March 31,
(in thousands, except per share amounts) |  | 2019 |  | 2018
Net income |  | $ | 12,852 |  |  | $ | 10,782 |
Less: (a) Distributed earnings to common shareholders |  | 10,113 |  |  | 9,362 |
Distributed earnings to participating securities |  | 47 |  |  | 46 |
Undistributed earnings |  | 2,692 |  |  | 1,374 |
(b) Undistributed earnings allocated to common shareholders |  | 2,679 |  |  | 1,367 |
Undistributed earnings allocated to participating securities |  | 13 |  |  | 7 |
Total income available to common shareholders, basic (a)+(b) |  | $ | 12,792 |  |  | $ | 10,729 |
Weighted average Common Shares outstanding, basic |  | 36,773 |  |  | 36,712 |
Basic earnings per Common Share |  | $ | 0.35 |  |  | $ | 0.29 |
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 March 31,
(in thousands, except per share amounts) |  | 2019 |  | 2018
Common shareholders earnings, basic |  | $ | 12,792 |  |  | $ | 10,729 |
Undistributed earnings for dilutive stock-based awards |  | 13 |  |  | 8 |
Total common shareholders earnings, diluted |  | $ | 12,805 |  |  | $ | 10,737 |
Weighted average common shares outstanding, basic |  | 36,773 |  |  | 36,712 |
Stock-based compensation (1) |  | 178 |  |  | 162 |
Weighted average common shares outstanding, diluted |  | 36,951 |  |  | 36,874 |
Diluted earnings per Common Share |  | $ | 0.35 |  |  | $ | 0.29 |
(1) In applying the treasury stock method of reflecting the dilutive effect of outstanding stock-based compensation in the calculation of diluted EPS, 29,160 and 47,792 stock options at March 31, 2019 and 2018, respectively, were deemed to be outstanding in accordance with accounting guidance on earnings per share. All of the 184,833 and 193,740 restricted stock units at March 31, 2019 and 2018, respectively, were included in the calculation of diluted EPS for the three months ended March 31, 2019 and 2018.

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