CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
REVENUE:
Total revenue	$ 123,865	$ 109,098	$ 248,375	$ 220,004
OPERATING EXPENSES (excluding depreciation and amortization unless otherwise indicated):
Selling, general and administrative	40,652	34,125	78,344	68,552
Transaction-related charges	1,396	72	2,126	116
Depreciation and amortization	20,155	21,991	40,662	44,509
Loss on disposition of long-lived assets	743	49	861	64
Total operating expenses	120,960	102,074	242,121	205,680
Income from operations	2,905	7,024	6,254	14,324
OTHER INCOME (EXPENSE)
Interest income	46	66	40	309
Interest expense	(1,137)	(1,574)	(2,285)	(2,730)
Other income (expense)	(66)	590	2,309	(2,310)
Other income (expense), net	(1,157)	(918)	64	(4,731)
INCOME BEFORE INCOME TAXES	1,748	6,106	6,318	9,593
Income tax provisions	(1,542)	(2,258)	(1,247)	(1,149)
NET INCOME	3,290	8,364	7,565	10,742
Net income attributable to non-controlling interests, net of tax expense of $0.3 million, $0.2 million, $0.4 million, and $0.6 million, respectively.	(1,271)	(3,618)	(2,842)	(7,009)
NET INCOME ATTRIBUTABLE TO ATN INTERNATIONAL, INC. STOCKHOLDERS	$ 2,019	$ 4,746	$ 4,723	$ 3,733
NET INCOME PER WEIGHTED AVERAGE SHARE ATTRIBUTABLE TO ATN INTERNATIONAL, INC. STOCKHOLDERS:
Basic (in dollars per share)	$ 0.13	$ 0.30	$ 0.30	$ 0.23
Diluted (in dollars per share)	$ 0.13	$ 0.30	$ 0.30	$ 0.23
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
Basic (in shares)	15,912	15,970	15,907	15,958
Diluted (in shares)	15,921	16,004	15,930	15,993
DIVIDENDS PER SHARE APPLICABLE TO COMMON STOCK	$ 0.17	$ 0.17	$ 0.34	$ 0.34
Communication services
REVENUE:
Total revenue	$ 112,964	$ 106,240	$ 223,599	$ 214,145
OPERATING EXPENSES (excluding depreciation and amortization unless otherwise indicated):
Cost of services	48,479	45,837	97,986	92,439
Other
REVENUE:
Total revenue	10,901	$ 2,858	24,776	$ 5,859
Construction
OPERATING EXPENSES (excluding depreciation and amortization unless otherwise indicated):
Cost of services	$ 9,535		$ 22,142