CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Redeemable Preferred Units	Redeemable Common Units	Total ATNI Stockholders' Equity	Common Stock	Treasury Stock, at cost	Additional Paid In Capital	Retained Earnings	Redeemable Common Units.	Accumulated Other Comprehensive Income/(Loss)	Non-Controlling Interests	Total
Increase (decrease) in temporary equity
Issuance of redeemable units	$ 48,334	$ 22,640
Accrued dividend - redeemable preferred units	846										$ 846
Investments made by minority shareholders in consolidated affiliates										$ 329	329
Deemed dividend - redeemable common unit		5,083									5,083
Net income (loss)		(5,083)									(5,083)
Total comprehensive income (loss)		(5,083)									(5,083)
Ending balance at Sep. 30, 2021	49,180	22,640									71,820
Balance, beginning of period at Dec. 31, 2020			$ 645,649	$ 172	$ (59,456)	$ 187,754	$ 516,901		$ 278	108,687	754,336
Increase (Decrease) in Stockholders' Equity
Purchase of shares of common stock			(6,548)		(6,548)						(6,548)
Stock-based compensation			4,874			4,874				125	4,999
Exercise of stock options			383			383					383
Noncontrolling interests in acquired entity										544	544
Dividends declared on common stock			(8,109)				(8,109)			(2,823)	(10,932)
Accrued dividend			(846)				(846)				(846)
Repurchase of non-controlling interests			(2,187)			(2,187)				(10,649)	(12,836)
Deemed dividend							(5,083)	$ 5,083
Investments made by minority shareholders in consolidated affiliates										329	329
Comprehensive income:
Net income (loss)			(2,980)				2,103	(5,083)		6,069	3,089
Other comprehensive income (loss)			(944)						(944)		(944)
Comprehensive income (loss)			(3,924)				2,103	(5,083)	(944)	6,069	2,145
Balance, end of period at Sep. 30, 2021			629,292	172	(66,004)	190,824	504,966		(666)	102,282	731,574
Increase (decrease) in temporary equity
Issuance of redeemable units	48,334	22,640
Accrued dividend - redeemable preferred units	846										846
Deemed dividend - redeemable common unit		5,083									5,083
Net income (loss)		(5,083)									(5,083)
Total comprehensive income (loss)		(5,083)									(5,083)
Ending balance at Sep. 30, 2021	49,180	22,640									71,820
Balance, beginning of period at Jun. 30, 2021			641,926	172	(63,388)	189,006	516,208		(72)	99,260	741,186
Increase (Decrease) in Stockholders' Equity
Purchase of shares of common stock			(2,616)		(2,616)						(2,616)
Stock-based compensation			1,435			1,435				99	1,534
Exercise of stock options			383			383					383
Noncontrolling interests in acquired entity										470	470
Dividends declared on common stock			(2,694)				(2,694)			(335)	(3,029)
Accrued dividend			(846)				(846)				(846)
Repurchase of non-controlling interests										(439)	(439)
Deemed dividend							(5,083)	5,083
Comprehensive income:
Net income (loss)			(7,702)				(2,619)	(5,083)		3,227	(4,475)
Other comprehensive income (loss)			(594)						(594)		(594)
Comprehensive income (loss)			(8,296)				(2,619)	(5,083)	(594)	3,227	(5,069)
Balance, end of period at Sep. 30, 2021			629,292	172	(66,004)	190,824	504,966		(666)	102,282	731,574
Beginning balance at Dec. 31, 2021	50,296	22,640									72,936
Increase (decrease) in temporary equity
Accrued dividend - redeemable preferred units	3,462										3,462
Investments made by minority shareholders in consolidated affiliates										22	22
Deemed dividend - redeemable common unit		2,762									2,762
Net income (loss)		(2,762)									(2,762)
Total comprehensive income (loss)		(2,762)									(2,762)
Ending balance at Sep. 30, 2022	53,758	22,640									76,398
Balance, beginning of period at Dec. 31, 2021			601,250	172	(71,714)	192,132	475,887		4,773	101,003	702,253
Increase (Decrease) in Stockholders' Equity
Purchase of shares of common stock			(2,114)		(2,114)						(2,114)
Stock-based compensation			5,225			5,225				471	5,696
Dividends declared on common stock			(8,035)				(8,035)			(1,375)	(9,410)
Accrued dividend			(3,462)				(3,462)				(3,462)
Repurchase of non-controlling interests			(454)			(454)				(4,178)	(4,632)
Deemed dividend							(2,762)	2,762
Investments made by minority shareholders in consolidated affiliates										22	22
Comprehensive income:
Net income (loss)			(7,017)				(4,255)	(2,762)		1,980	(5,037)
Other comprehensive income (loss)			(933)						(933)		(933)
Comprehensive income (loss)			(7,950)				(4,255)	(2,762)	(933)	1,980	(5,970)
Balance, end of period at Sep. 30, 2022			584,460	172	(73,828)	196,903	457,373		3,840	97,923	682,383
Beginning balance at Jun. 30, 2022	52,566	22,640									75,206
Increase (decrease) in temporary equity
Accrued dividend - redeemable preferred units	1,192										1,192
Investments made by minority shareholders in consolidated affiliates										11	11
Deemed dividend - redeemable common unit		1,083									1,083
Net income (loss)		(1,083)									(1,083)
Total comprehensive income (loss)		(1,083)									(1,083)
Ending balance at Sep. 30, 2022	$ 53,758	$ 22,640									76,398
Balance, beginning of period at Jun. 30, 2022			591,119	172	(73,828)	195,432	465,112		4,231	95,752	686,871
Increase (Decrease) in Stockholders' Equity
Stock-based compensation			1,481			1,481				186	1,667
Dividends declared on common stock			(2,681)				(2,681)				(2,681)
Accrued dividend			(1,192)				(1,192)				(1,192)
Repurchase of non-controlling interests			(10)			(10)				(120)	(130)
Deemed dividend							(1,083)	1,083
Investments made by minority shareholders in consolidated affiliates										11	11
Comprehensive income:
Net income (loss)			(3,866)				(2,783)	(1,083)		2,094	(1,772)
Other comprehensive income (loss)			(391)						(391)		(391)
Comprehensive income (loss)			(4,257)				(2,783)	$ (1,083)	(391)	2,094	(2,163)
Balance, end of period at Sep. 30, 2022			$ 584,460	$ 172	$ (73,828)	$ 196,903	$ 457,373		$ 3,840	$ 97,923	$ 682,383