CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 48,894	$ 24,214	$ 33,156
Other comprehensive income:
Foreign currency translation adjustment	1,265	(687)	26
Reclassifications of gains on sale of marketable securities to net income	(1,044)
Unrealized gain on securities	440	868
Projected pension benefit obligation, net of tax expense of $0.7 million, $0.7 million and $0.7 million	1,357	5,251	(809)
Other comprehensive income (loss), net of tax	2,018	5,432	(783)
Comprehensive income	50,912	29,646	32,373
Less: Comprehensive income attributable to non-controlling interests	(17,406)	(12,113)	(16,216)
Comprehensive income attributable to ATN International, Inc.	$ 33,506	$ 17,533	$ 16,157