CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total ATNI Stockholders' Equity	Common Stock	Treasury Stock, at cost	Additional Paid In Capital	Retained Earnings	Accumulated Other Comprehensive Income/(Loss)	Non-Controlling Interests	Total
Balance, beginning of period at Dec. 31, 2018	$ 695,387	$ 172	$ (48,547)	$ 181,778	$ 563,593	$ (1,609)	$ 127,937	$ 823,324
Increase (Decrease) in Stockholders' Equity
Purchase of shares of common stock	(1,569)		(1,569)					(1,569)
Stock-based compensation	1,301			1,301				1,301
Dividends declared on common stock	(2,693)				(2,693)		(1,553)	(4,246)
Repurchase of non-controlling interests							(225)	(225)
Investments made by minority shareholders in consolidated affiliates							488	488
Comprehensive income:
Net income (loss)	(1,581)				(1,581)		2,316	735
Other comprehensive income	176					176		176
Comprehensive income (loss)	(1,405)						2,316	911
Balance, end of period at Mar. 31, 2019	691,021	172	(50,116)	183,079	559,319	(1,433)	128,963	819,984
Balance, beginning of period at Dec. 31, 2019	676,122	172	(51,129)	188,471	541,890	(3,282)	129,961	806,083
Increase (Decrease) in Stockholders' Equity
Purchase of shares of common stock	(3,229)		(3,229)					(3,229)
Stock-based compensation	1,196			1,196			(36)	1,160
Dividends declared on common stock	(2,715)				(2,715)		(4,220)	(6,935)
Repurchase of non-controlling interests							(1,774)	(1,774)
Comprehensive income:
Net income (loss)	(1,014)				(1,014)		3,390	2,376
Other comprehensive income	(4,602)					(4,602)		(4,602)
Comprehensive income (loss)	(5,616)						3,390	(2,226)
Balance, end of period at Mar. 31, 2020	$ 665,758	$ 172	$ (54,358)	$ 189,667	$ 538,161	$ (7,884)	$ 127,321	$ 793,079