CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Net income (loss)	$ (2,303)	$ 11,584
Other comprehensive income:
Foreign currency translation adjustment	(1,032)	1,930
Reclassifications of gains on sale of marketable securities to net income		(289)
Unrealized gain (loss) on securities	139	(41)
Projected pension benefit obligation, net of tax of $0 and $0.4 million		513
Other comprehensive income (loss), net of tax	(893)	2,113
Comprehensive income (loss)	(3,196)	13,697
Less: Comprehensive income attributable to non-controlling interests	(3,252)	(4,725)
Comprehensive income (loss) attributable to ATN International, Inc.	$ (6,448)	$ 8,972