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CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands | Total ATNI Stockholders' Equity | Common Stock | Treasury Stock, Common, at cost | Additional Paid In Capital | Retained Earnings | Accumulated Other Comprehensive Income/(Loss) | Non-Controlling Interests | Total
--- | --- | --- | --- | --- | --- | --- | --- | ---
Equity, beginning of period at Dec. 31, 2015 | $ 680,299 | $ 168 | $ (18,254) | $ 154,768 | $ 547,321 | $ (3,704) | $ 81,425 | $ 761,724
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |
Issuance of 100,005, 95,095 and 13,664 restricted shares of common stock for the years ended December 31,2016, 2017 and 2018, respectively | (1) |  |  | (1) |  |  |  | (1)
Issuance of 43,053, 35,081 and 158,021 shares of common stock upon exercise of stock options for the years ended December 31,2016 , 2017 and 2018, respectively | 1,409 | 1 |  | 1,408 |  |  |  | 1,409
Purchase of common stock (70,686, 234,746 and 171,907 for the years ended December 31, 2016, 2017, and 2018, respectively) | (4,873) |  | (4,873) |  |  |  |  | (4,873)
Stock-based compensation | 6,440 |  |  | 6,440 |  |  |  | 6,440
Dividends declared on common stock | (21,313) |  |  |  | (21,313) |  | (8,848) | (30,161)
Excess tax benefits from share-based compensation | 592 |  |  | 592 |  |  |  | 592
Non-controlling interest in equity acquired | (4,106) |  |  | (4,106) |  |  | 29,998 | 25,892
Investments made by minority shareholders |  |  |  |  |  |  | 22,409 | 22,409
Deconsolidation of a subsidiary |  |  |  |  |  |  | (310) | (310)
Repurchase of non-controlling interests | 1,075 |  |  | 1,075 |  |  | (4,673) | (3,598)
Comprehensive income: |  |  |  |  |  |  |  |
Net income | 12,101 |  |  |  | 12,101 |  | 12,113 | 24,214
Other comprehensive loss, net of tax | 5,432 |  |  |  |  | 5,432 |  | 5,432
Comprehensive income | 17,533 |  |  |  |  |  | 12,113 | 29,646
Equity, end of period at Dec. 31, 2016 | 677,055 | 169 | (23,127) | 160,176 | 538,109 | 1,728 | 132,114 | 809,169
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |
Issuance of 100,005, 95,095 and 13,664 restricted shares of common stock for the years ended December 31,2016, 2017 and 2018, respectively | 1 | 1 |  |  |  |  |  | 1
Issuance of 43,053, 35,081 and 158,021 shares of common stock upon exercise of stock options for the years ended December 31,2016 , 2017 and 2018, respectively | 1,156 |  |  | 1,156 |  |  |  | 1,156
Purchase of common stock (70,686, 234,746 and 171,907 for the years ended December 31, 2016, 2017, and 2018, respectively) | (12,983) |  | (12,983) |  |  |  |  | (12,983)
Stock-based compensation | 6,970 |  |  | 6,970 |  |  |  | 6,970
Dividends declared on common stock | (16,465) |  |  |  | (16,465) |  | (7,318) | (23,783)
Investments made by minority shareholders |  |  |  |  |  |  | 123 | 123
Deconsolidation of a subsidiary |  |  |  |  |  |  | 529 | 529
Repurchase of non-controlling interests | (670) |  |  | (670) |  |  | (1,356) | (2,026)
Change in accounting method- adoption | 155 |  |  | 341 | (186) |  |  | 155
Comprehensive income: |  |  |  |  |  |  |  |
Net income | 31,490 |  |  |  | 31,490 |  | 17,404 | 48,894
Other comprehensive loss, net of tax | 2,018 |  |  |  |  | 2,018 |  | 2,018
Comprehensive income | 33,508 |  |  |  |  |  | 17,404 | 50,912
Equity, end of period at Dec. 31, 2017 | 688,727 | 170 | (36,110) | 167,973 | 552,948 | 3,746 | 141,496 | 830,223
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |
Issuance of 100,005, 95,095 and 13,664 restricted shares of common stock for the years ended December 31,2016, 2017 and 2018, respectively | 2 | 2 |  |  |  |  |  | 2
Issuance of 43,053, 35,081 and 158,021 shares of common stock upon exercise of stock options for the years ended December 31,2016 , 2017 and 2018, respectively | 6,319 |  |  | 6,319 |  |  |  | 6,319
Purchase of common stock (70,686, 234,746 and 171,907 for the years ended December 31, 2016, 2017, and 2018, respectively) | (12,437) |  | (12,437) |  |  |  |  | (12,437)
Stock-based compensation | 6,420 |  |  | 6,420 |  |  |  | 6,420
Dividends declared on common stock | (10,863) |  |  |  | (10,863) |  | (19,033) | (29,896)
Repurchase of non-controlling interests | 1,066 |  |  | 1,066 |  |  | (10,729) | (9,663)
Change in accounting method- adoption | 1,490 |  |  |  | 1,693 | (203) | 1,146 | 2,636
Comprehensive income: |  |  |  |  |  |  |  |
Net income | 19,815 |  |  |  | 19,815 |  | 15,057 | 34,872
Other comprehensive loss, net of tax | (5,152) |  |  |  |  | (5,152) |  | (5,152)
Comprehensive income | 14,663 |  |  |  |  |  | 15,057 | 29,720
Equity, end of period at Dec. 31, 2018 | $ 695,387 | $ 172 | $ (48,547) | $ 181,778 | $ 563,593 | $ (1,609) | $ 127,937 | $ 823,324

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