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Equity (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Balance at beginning of period | $ 779,906 | $ 730,157
Net loss | (20,307) | (7,640)
Issuance of common stock | 7,229 | 3,179
Repurchase of common stock | (1,373) | (2,074)
Dividends paid on common stock | $ (10,315) | $ (9,493)
Dividends paid on common stock (in dollars per share) | $ 0.2125 | $ 0.1975
Balance at end of period (in shares) | 48,714,000 | 48,532,000
Balance at end of period | $ 755,140 | $ 714,129
Common Stock |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Balance at beginning of period (in shares) | 48,532,000 | 48,065,000
Balance at beginning of period | $ 485 | $ 481
Issuance of common stock (in shares) | 210,000 | 109,000
Issuance of common stock | $ 2 | $ 0
Repurchase of common stock (in shares) | (28,000) | (40,000)
Balance at end of period (in shares) | 48,714,000 | 48,134,000
Balance at end of period | $ 487 | $ 481
Additional Paid-in Capital |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Balance at beginning of period | 362,275 | 337,623
Issuance of common stock | 7,227 | 3,179
Repurchase of common stock | (1,373) | (2,074)
Balance at end of period | 368,129 | 338,728
Retained Earnings |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Balance at beginning of period | 417,146 | 392,053
Net loss | (20,307) | (7,640)
Dividends paid on common stock | (10,315) | (9,493)
Balance at end of period | $ 386,524 | $ 374,920

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