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
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 3,773	$ 15,007	$ (141,497)	$ 31,021
Other comprehensive income, net of tax:
Foreign currency translation adjustments	(34,160)	20,447	(17,860)	35,463
Net unrealized gain (loss) on derivative instruments, designated as cash flow hedges	486	(231)	1,655	61
Pension benefit obligation adjustment	401	193	815	594
Total other comprehensive income (loss), net of tax	(33,273)	20,409	(15,390)	36,118
Total comprehensive income (loss), net of tax	(29,500)	35,416	(156,887)	67,139
Comprehensive income attributable to noncontrolling interests, net of tax	1,116	910	1,512	1,079
Comprehensive income (loss) attributable to Itron, Inc.	$ (30,616)	$ 34,506	$ (158,399)	$ 66,060