CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Net income (loss)	$ (20,976)	$ 11,694	$ 1,519	$ 20,606
Other comprehensive income:
Foreign currency translation adjustment	(1,311)	(164)	921	(200)
Reclassifications of gains on sale of marketable securities to net income			(1,044)
Unrealized gain (loss) on securities	67		(65)
Projected pension benefit obligation			513
Other comprehensive income (loss), net of tax	(1,244)	(164)	325	(200)
Comprehensive income (loss)	(22,220)	11,530	1,844	20,406
Less: Comprehensive income attributable to non-controlling interests	(3,784)	(4,523)	(13,535)	(10,400)
Comprehensive income (loss) attributable to ATN International, Inc.	$ (26,004)	$ 7,007	$ (11,691)	$ 10,006