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Stockholders' Equity (Tables) | 6 Months Ended
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Jun. 30, 2020
Equity [Abstract] |
Summary of Changes in Stockholders' Equity | A summary of the changes in stockholders’ equity for the three and six months ended June 30, 2020 and 2019, is as follows (in thousands except per share amounts):
|  | Common Stock |  |  | Additional Paid-in |  |  | Dividends Paid In Excess |  |  |  |  |
|  | Shares |  |  | Amount |  |  | Capital |  |  | Of Earnings |  |  | Total |
BALANCE, MARCH 31, 2020 |  |  | 41,391 |  |  | $ | 414 |  |  | $ | 656,981 |  |  | $ | (70,920 | ) |  | $ | 586,475 |
Net earnings |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10,973 |  |  |  | 10,973 |
Dividends declared — $0.37 per share |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (15,768 | ) |  |  | (15,768 | )
Shares issued pursuant to ATM Program, net |  |  | 404 |  |  |  | 4 |  |  |  | 11,940 |  |  |  | — |  |  |  | 11,944 |
Shares issued pursuant to dividend reinvestment |  |  | 1 |  |  |  | — |  |  |  | 16 |  |  |  | — |  |  |  | 16 |
Stock-based compensation/settlements |  |  | — |  |  |  | — |  |  |  | 868 |  |  |  | — |  |  |  | 868 |
BALANCE, JUNE 30, 2020 |  |  | 41,796 |  |  | $ | 418 |  |  | $ | 669,805 |  |  | $ | (75,715 | ) |  | $ | 594,508 |
BALANCE, DECEMBER 31, 2019 |  |  | 41,368 |  |  | $ | 414 |  |  | $ | 656,127 |  |  | $ | (67,102 | ) |  | $ | 589,439 |
Net earnings |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 23,673 |  |  |  | 23,673 |
Cumulative-effect adjustment for the adoption of new accounting pronouncement (Note 2) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (886 | ) |  |  | (886 | )
Dividends declared — $0.74 per share |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (31,400 | ) |  |  | (31,400 | )
Shares issued pursuant to ATM Program, net |  |  | 404 |  |  |  | 4 |  |  |  | 11,912 |  |  |  | — |  |  |  | 11,916 |
Shares issued pursuant to dividend reinvestment |  |  | 13 |  |  |  | — |  |  |  | 410 |  |  |  | — |  |  |  | 410 |
Stock-based compensation/settlements |  |  | 11 |  |  |  | — |  |  |  | 1,356 |  |  |  | — |  |  |  | 1,356 |
BALANCE, JUNE 30, 2020 |  |  | 41,796 |  |  | $ | 418 |  |  | $ | 669,805 |  |  | $ | (75,715 | ) |  | $ | 594,508 |
|  | Common Stock |  |  | Additional Paid-in |  |  | Dividends Paid In Excess |  |  |  |  |
|  | Shares |  |  | Amount |  |  | Capital |  |  | Of Earnings |  |  | Total |
BALANCE, MARCH 31, 2019 |  |  | 40,883 |  |  | $ | 409 |  |  | $ | 638,877 |  |  | $ | (61,051 | ) |  | $ | 578,235 |
Net earnings |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 13,198 |  |  |  | 13,198 |
Dividends declared — $0.35 per share |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (14,628 | ) |  |  | (14,628 | )
Shares issued pursuant to ATM Program, net |  |  | 213 |  |  |  | 2 |  |  |  | 6,678 |  |  |  | — |  |  |  | 6,680 |
Shares issued pursuant to dividend reinvestment |  |  | 12 |  |  |  | — |  |  |  | 361 |  |  |  | — |  |  |  | 361 |
Stock-based compensation/settlements |  |  | — |  |  |  | — |  |  |  | 665 |  |  |  | — |  |  |  | 665 |
BALANCE, JUNE 30, 2019 |  |  | 41,108 |  |  | $ | 411 |  |  | $ | 646,581 |  |  | $ | (62,481 | ) |  | $ | 584,511 |
BALANCE, DECEMBER 31, 2018 |  |  | 40,855 |  |  | $ | 409 |  |  | $ | 638,178 |  |  | $ | (57,423 | ) |  | $ | 581,164 |
Net earnings |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 24,125 |  |  |  | 24,125 |
Dividends declared — $0.70 per share |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (29,183 | ) |  |  | (29,183 | )
Shares issued pursuant to ATM Program, net |  |  | 213 |  |  |  | 2 |  |  |  | 6,661 |  |  |  | — |  |  |  | 6,663 |
Shares issued pursuant to dividend reinvestment |  |  | 24 |  |  |  | — |  |  |  | 718 |  |  |  | — |  |  |  | 718 |
Stock-based compensation/settlements |  |  | 16 |  |  |  | — |  |  |  | 1,024 |  |  |  | — |  |  |  | 1,024 |
BALANCE, JUNE 30, 2019 |  |  | 41,108 |  |  | $ | 411 |  |  | $ | 646,581 |  |  | $ | (62,481 | ) |  | $ | 584,511 |

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- Definition Tabular disclosure of changes in the separate accounts comprising stockholders' equity (in addition to retained earnings) and of the changes in the number of shares of equity securities during at least the most recent annual fiscal period and any subsequent interim period presented is required to make the financial statements sufficiently informative if both financial position and results of operations are presented. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 + Details
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