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Consolidated Statements of Changes in Stockholders' Equity Statement - USD ($) $ in Thousands | Total | Common Stock | Additional Paid-in Capital | Retained Earnings | Accumulated Other Comprehensive Income (Loss)
--- | --- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2018 | $ 889,312 | $ 28 | $ 495,366 | $ 393,918 | $ 0
Beginning balance (in shares) at Dec. 31, 2018 |  | 28,404,316 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net income | 5,873 |  |  | 5,873 |
Share-based compensation | 870 |  | 886 | (16) |
Issuance of restricted and deferred stock units | (132) |  | (132) |  |
Issuance of restricted and deferred stock units (in shares) |  | 14,312 |  |  |
Employee stock purchase plan | 811 |  | 811 |  |
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs | (10) |  | (10) |  |
Employee stock purchase plan (in shares) |  | 15,932 |  |  |
Dividends paid | (8,528) |  |  | (8,528) |
Ending balance at Mar. 31, 2019 | 888,293 | $ 28 | 496,921 | 391,344 | 0
Ending balance (in shares) at Mar. 31, 2019 |  | 28,434,560 |  |  |
Beginning balance at Dec. 31, 2019 | $ 889,984 | $ 28 | 506,639 | 383,191 | 126
Beginning balance (in shares) at Dec. 31, 2019 | 28,456,508 | 28,456,508 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net income | $ 2,417 |  |  | 2,417 |
Unrealized Gain (Loss) on Investments | (135) |  |  |  | (135)
Share-based compensation | 208 |  | 251 | (43) |
Issuance of restricted and deferred stock units | (785) |  | (785) |  |
Issuance of restricted and deferred stock units (in shares) |  | 25,781 |  |  |
Employee stock purchase plan | 970 |  | 970 |  |
Employee stock purchase plan (in shares) |  | 15,552 |  |  |
Dividends paid | (9,118) |  |  | (9,118) |
Ending balance at Mar. 31, 2020 | $ 883,541 | $ 28 | $ 507,075 | $ 376,447 | $ (9)
Ending balance (in shares) at Mar. 31, 2020 | 28,497,841 | 28,497,841 |  |  |

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