CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Net income	$ 10,780	$ 10,909	$ 8,477	$ 22,494
Other comprehensive income:
Foreign currency translation adjustment	(2,551)	302	(3,583)	2,232
Reclassifications of gains on sale of marketable securities to net income		(755)		(1,044)
Unrealized gain (loss) on securities	42	(90)	181	(130)
Projected pension benefit obligation, net of tax of $0.0 million, $0.0 million, $0.0 million, and $0.4 million, respectively				513
Other comprehensive income (loss), net of tax	(2,509)	(543)	(3,402)	1,571
Comprehensive income	8,271	10,366	5,075	24,065
Less: Comprehensive income attributable to non-controlling interests	(3,564)	(5,026)	(6,816)	(9,751)
Comprehensive income (loss) attributable to ATN International, Inc.	$ 4,707	$ 5,340	$ (1,741)	$ 14,314