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EQUITY (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Stockholders' equity |  |  |  |
Equity, beginning of period |  |  | $ 809,169 | $ 761,724
Stock-based compensation |  |  | 5,415 | 5,034
Comprehensive income: |  |  |  |
Net income | $ (20,976) | $ 11,694 | 1,519 | 20,606
Projected pension benefit obligation |  |  | 513 |
Unrealized gain (loss) on securities | 67 |  | (65) |
Reclassifications of gains on sale of marketable securities to net income |  |  | (1,044) |
Foreign currency translation adjustment | (1,311) | (164) | 921 | (200)
Comprehensive income (loss) | (22,220) | 11,530 | 1,844 | 20,406
Issuance of common stock upon exercise of stock options |  |  | 1,057 | 1,371
Dividends declared on common stock |  |  | (13,680) | (15,838)
Distributions to non-controlling interests |  |  | (3,761) | (7,828)
Investments made by non-controlling interests |  |  | 123 | 22,409
Acquisition from non-controlling interest |  |  |  | (576)
Loss on deconsolidation of subsidiary |  |  | 529 |
Repurchase of non-controlling interests |  |  | (1,104) | (7,045)
Purchase of treasury stock |  |  | (12,968) | (4,755)
Equity, end of period | 786,734 | 807,840 | 786,734 | 807,840
One Communications (formerly KeyTech) |  |  |  |
Comprehensive income: |  |  |  |
Acquisition |  |  |  | 32,717
Viya (formerly Innovative) |  |  |  |
Comprehensive income: |  |  |  |
Acquisition |  |  |  | 221
Accounting Standards Update 2016-09 |  |  |  |
Comprehensive income: |  |  |  |
Change in accounting method- adoption of ASC 2016-09 |  |  | 110 |
Total ATNI Stockholders' Equity |  |  |  |
Stockholders' equity |  |  |  |
Equity, beginning of period |  |  | 677,055 | 680,299
Stock-based compensation |  |  | 5,415 | 5,034
Comprehensive income: |  |  |  |
Net income |  |  | (12,016) | 10,206
Projected pension benefit obligation |  |  | 513 |
Unrealized gain (loss) on securities |  |  | (65) |
Reclassifications of gains on sale of marketable securities to net income |  |  | (1,044) |
Foreign currency translation adjustment |  |  | 921 | (200)
Comprehensive income (loss) |  |  | (11,691) | 10,006
Issuance of common stock upon exercise of stock options |  |  | 1,057 | 1,371
Dividends declared on common stock |  |  | (13,680) | (15,838)
Acquisition from non-controlling interest |  |  |  | (306)
Repurchase of non-controlling interests |  |  | (670) | (4,105)
Purchase of treasury stock |  |  | (12,968) | (4,755)
Equity, end of period | 644,628 | 671,706 | 644,628 | 671,706
Total ATNI Stockholders' Equity | Accounting Standards Update 2016-09 |  |  |  |
Comprehensive income: |  |  |  |
Change in accounting method- adoption of ASC 2016-09 |  |  | 110 |
Non-Controlling Interests |  |  |  |
Stockholders' equity |  |  |  |
Equity, beginning of period |  |  | 132,114 | 81,425
Comprehensive income: |  |  |  |
Net income |  |  | 13,535 | 10,400
Comprehensive income (loss) |  |  | 13,535 | 10,400
Distributions to non-controlling interests |  |  | (3,761) | (7,828)
Investments made by non-controlling interests |  |  | 123 | 22,409
Acquisition from non-controlling interest |  |  |  | (270)
Loss on deconsolidation of subsidiary |  |  | 529 |
Repurchase of non-controlling interests |  |  | (434) | (2,940)
Equity, end of period | $ 142,106 | $ 136,134 | $ 142,106 | 136,134
Non-controlling interest's cash contribution to subsidiary |  |  |  | 21,700
Non-Controlling Interests | One Communications (formerly KeyTech) |  |  |  |
Comprehensive income: |  |  |  |
Acquisition |  |  |  | 32,717
Non-Controlling Interests | Viya (formerly Innovative) |  |  |  |
Comprehensive income: |  |  |  |
Acquisition |  |  |  | $ 221

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