CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
REVENUE:
Total Revenue	$ 109,098	$ 107,721	$ 220,004	$ 211,021
OPERATING EXPENSES (excluding depreciation and amortization unless otherwise indicated):
Termination and access fees	28,470	27,930	56,583	55,818
Engineering and operations	17,367	19,107	35,856	38,139
Sales, marketing and customer service	9,373	9,874	18,876	19,264
General and administrative	24,752	26,590	49,676	50,405
Transaction-related charges	72	28	116	68
Depreciation and amortization	21,991	21,549	44,509	42,267
(Gain) loss on disposition of long-lived assets	49	(111)	64	191
Total operating expenses	102,074	104,967	205,680	206,152
Income from operations	7,024	2,754	14,324	4,869
OTHER INCOME (EXPENSE)
Interest income	66	517	309	1,445
Interest expense	(1,574)	(1,263)	(2,730)	(2,544)
Other income (expense)	590	(255)	(2,310)	(68)
Other income (expense), net	(918)	(1,001)	(4,731)	(1,167)
INCOME BEFORE INCOME TAXES	6,106	1,753	9,593	3,702
Income tax provisions	(2,258)	(274)	(1,149)	939
NET INCOME	8,364	2,027	10,742	2,763
Net income attributable to non-controlling interests, net of tax expense of $0.2 million, $0.3 million, $0.6 million, $0.7 million, respectively.	(3,618)	(2,883)	(7,009)	(5,198)
NET INCOME (LOSS) ATTRIBUTABLE TO ATN INTERNATIONAL, INC. STOCKHOLDERS	$ 4,746	$ (856)	$ 3,733	$ (2,435)
NET INCOME (LOSS) PER WEIGHTED AVERAGE SHARE ATTRIBUTABLE TO ATN INTERNATIONAL, INC. STOCKHOLDERS:
Basic (in dollars per share)	$ 0.30	$ (0.05)	$ 0.23	$ (0.15)
Diluted (in dollars per share)	$ 0.30	$ (0.05)	$ 0.23	$ (0.15)
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
Basic (in shares)	15,970	15,997	15,958	15,986
Diluted (in shares)	16,004	15,997	15,993	15,986
DIVIDENDS PER SHARE APPLICABLE TO COMMON STOCK (in dollars per share)	$ 0.17	$ 0.17	$ 0.34	$ 0.34
Communication services
REVENUE:
Total Revenue	$ 106,240	$ 105,019	$ 214,145	$ 205,633
Other
REVENUE:
Total Revenue	$ 2,858	$ 2,702	$ 5,859	$ 5,388