CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
REVENUE:
Total revenue	$ 455,444	$ 438,722	$ 451,207
OPERATING EXPENSES (excluding depreciation and amortization unless otherwise indicated):
Termination and access fees	111,763	112,943	114,478
Construction costs	10,616
Engineering and operations	73,350	77,649	73,031
Sales, marketing and customer service	37,557	38,730	35,207
General and administrative	101,454	100,534	104,267
Transaction-related charges	1,641	244	2,642
Restructuring charges			515
Depreciation and amortization	88,311	89,125	85,719
Goodwill impairment	0	3,279	0
Loss on disposition of long-lived assets	21,572	2,841	(26,425)
Loss on damaged assets and other hurricane related charges, net of insurance recovery			750
Total operating expenses	446,264	425,345	390,184
Income from operations	9,180	13,377	61,023
OTHER INCOME (EXPENSE)
Interest income	421	2,263	1,811
Interest expense	(5,347)	(5,010)	(7,973)
Other income (expense)	(4,161)	(4,558)	(1,119)
Other income (expense), net	(9,087)	(7,305)	(7,281)
INCOME BEFORE INCOME TAXES	93	6,072	53,742
Income tax provisions	801	4,105	18,870
NET INCOME	(708)	1,967	34,872
Net income attributable to non-controlling interests, net of tax expense of $1.1 million, $1.3 million, and $1.5 million, respectively.	(13,414)	(12,773)	(15,057)
NET INCOME (LOSS) ATTRIBUTABLE TO ATN INTERNATIONAL, INC. STOCKHOLDERS	$ (14,122)	$ (10,806)	$ 19,815
NET INCOME (LOSS) PER WEIGHTED AVERAGE SHARE ATTRIBUTABLE TO ATN INTERNATIONAL, INC. STOCKHOLDERS:
Basic (in dollars per share)	$ (0.89)	$ (0.68)	$ 1.24
Diluted (in dollars per share)	$ (0.89)	$ (0.68)	$ 1.24
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
Basic (in shares)	15,923	15,983	15,988
Diluted (in shares)	15,923	15,983	16,042
DIVIDENDS PER SHARE APPLICABLE TO COMMON STOCK (in dollars per share)	$ 0.68	$ 0.68	$ 0.68
Communication services
REVENUE:
Total revenue	$ 433,509	$ 428,108	$ 425,323
Other
REVENUE:
Total revenue	$ 21,935	$ 10,614	$ 25,884