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Earnings per Share/Capital Stock: (Tables) | 9 Months Ended
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Sep. 30, 2021
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) |  | 2021 |  | 2020 |  | 2021 |  | 2020
Net income |  | $ | 28,153 |  |  | $ | 26,530 |  |  | $ | 73,997 |  |  | $ | 66,214 |
Less: (a) Distributed earnings to common shareholders |  | 13,480 |  |  | 12,356 |  |  | 38,207 |  |  | 34,848 |
Distributed earnings to participating securities |  | 37 |  |  | 43 |  |  | 100 |  |  | 116 |
Undistributed earnings |  | 14,636 |  |  | 14,131 |  |  | 35,690 |  |  | 31,250 |
(b) Undistributed earnings allocated to common shareholders |  | 14,596 |  |  | 14,083 |  |  | 35,597 |  |  | 31,146 |
Undistributed earnings allocated to participating securities |  | 40 |  |  | 48 |  |  | 93 |  |  | 104 |
Total income available to common shareholders, basic (a)+(b) |  | $ | 28,076 |  |  | $ | 26,439 |  |  | $ | 73,804 |  |  | $ | 65,994 |
Weighted average Common Shares outstanding, basic |  | 36,933 |  |  | 36,886 |  |  | 36,916 |  |  | 36,877 |
Basic earnings per Common Share |  | $ | 0.76 |  |  | $ | 0.72 |  |  | $ | 2.00 |  |  | $ | 1.79 |
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) |  | 2021 |  | 2020 |  | 2021 |  | 2020
Common shareholders earnings, basic |  | $ | 28,076 |  |  | $ | 26,439 |  |  | $ | 73,804 |  |  | $ | 65,994 |
Undistributed earnings for dilutive stock-based awards |  | 40 |  |  | 48 |  |  | 93 |  |  | 104 |
Total common shareholders earnings, diluted |  | $ | 28,116 |  |  | $ | 26,487 |  |  | $ | 73,897 |  |  | $ | 66,098 |
Weighted average common shares outstanding, basic |  | 36,933 |  |  | 36,886 |  |  | 36,916 |  |  | 36,877 |
Stock-based compensation (1) |  | 92 |  |  | 116 |  |  | 88 |  |  | 113 |
Weighted average common shares outstanding, diluted |  | 37,025 |  |  | 37,002 |  |  | 37,004 |  |  | 36,990 |
Diluted earnings per Common Share |  | $ | 0.76 |  |  | $ | 0.72 |  |  | $ | 2.00 |  |  | $ | 1.79 |
(1) All of the 101,267 and 127,234 restricted stock units at September 30, 2021 and 2020, respectively, were included in the calculation of diluted EPS for the three and nine months ended September 30, 2021 and 2020.

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