CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
REVENUE:
Total Revenue	$ 117,788	$ 123,245	$ 222,263	$ 251,360
OPERATING EXPENSES (excluding depreciation and amortization unless otherwise indicated):
Termination and access fees	28,257	30,922	54,171	63,924
Engineering and operations	18,409	19,378	36,561	39,061
Sales, marketing and customer service	8,413	8,729	16,974	17,765
General and administrative	26,754	26,011	52,296	50,370
Transaction-related charges	438	148	465	826
Depreciation and amortization	21,913	22,254	43,217	44,747
(Gain) loss on disposition of long-lived assets	(2,333)		(2,049)	1,111
Loss on damaged assets and other hurricane related charges, net of insurance recovery	184		666
Total operating expenses	102,035	107,442	202,301	217,804
Income from operations	15,753	15,803	19,962	33,556
OTHER INCOME (EXPENSE)
Interest income	487	347	853	633
Interest expense	(2,327)	(2,153)	(4,532)	(4,469)
Loss on deconsolidation of subsidiary				(529)
Other expense	(1,045)	(492)	(1,798)	(973)
Other expense, net	(2,885)	(2,298)	(5,477)	(5,338)
INCOME BEFORE INCOME TAXES	12,868	13,505	14,485	28,218
Income tax provisions	2,088	2,596	6,008	5,724
NET INCOME	10,780	10,909	8,477	22,494
Net income attributable to non-controlling interests, net of tax expense of $0.3 million, $0.1 million, $0.6 million, and $0.4 million, respectively.	(3,564)	(5,026)	(6,816)	(9,751)
NET INCOME ATTRIBUTABLE TO ATN INTERNATIONAL, INC. STOCKHOLDERS	$ 7,216	$ 5,883	$ 1,661	$ 12,743
NET INCOME PER WEIGHTED AVERAGE SHARE ATTRIBUTABLE TO ATN INTERNATIONAL, INC. STOCKHOLDERS:
Basic (in dollars per share)	$ 0.45	$ 0.36	$ 0.10	$ 0.79
Diluted (in dollars per share)	$ 0.45	$ 0.36	$ 0.10	$ 0.78
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
Basic (in shares)	15,962	16,195	15,996	16,176
Diluted (in shares)	16,010	16,274	16,046	16,263
DIVIDENDS PER SHARE APPLICABLE TO COMMON STOCK (in dollars per share)	$ 0.17	$ 0.34	$ 0.34	$ 0.68
Wireless
REVENUE:
Total Revenue	$ 50,496	$ 56,546	$ 101,043	$ 115,471
Wireline
REVENUE:
Total Revenue	61,269	61,802	109,365	125,960
Renewable Energy
REVENUE:
Total Revenue	$ 6,023	$ 4,897	$ 11,855	$ 9,929