Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues
Revenues	$ 486,949	$ 540,184	$ 1,495,935	$ 1,648,193
Cost of revenues
Cost of revenues	351,986	396,933	1,044,053	1,194,859
Gross profit	134,963	143,251	451,882	453,334
Operating expenses
Sales, general and administrative	71,838	64,982	221,974	215,018
Research and development	46,889	46,224	147,379	148,999
Amortization of intangible assets	8,944	11,183	26,914	33,488
Restructuring	958	44,462	(830)	41,531
Loss on sale of business	2,171	380	28,274	57,295
Total operating expenses	130,800	167,231	423,711	496,331
Operating income (loss)	4,163	(23,980)	28,171	(42,997)
Other income (expense)
Interest income	352	354	1,326	2,165
Interest expense	(2,628)	(10,810)	(27,107)	(33,771)
Other income (expense), net	(1,761)	(2,607)	(16,684)	(3,414)
Total other income (expense)	(4,037)	(13,063)	(42,465)	(35,020)
Income (loss) before income taxes	126	(37,043)	(14,294)	(78,017)
Income tax benefit (provision)	(1,136)	11,985	(5,581)	(366)
Net loss	(1,010)	(25,058)	(19,875)	(78,383)
Net income attributable to noncontrolling interests	859	299	2,514	1,092
Net loss attributable to Itron, Inc.	$ (1,869)	$ (25,357)	$ (22,389)	$ (79,475)
Earnings (loss) per common share - Basic (in dollars per share)	$ (0.04)	$ (0.63)	$ (0.51)	$ (1.98)
Earnings (loss) per common share - Diluted (in dollars per share)	$ (0.04)	$ (0.63)	$ (0.51)	$ (1.98)
Weighted average common shares outstanding - Basic (in shares)	45,240	40,337	43,983	40,199
Weighted average common shares outstanding - Diluted (in shares)	45,240	40,337	43,983	40,199
Product [Member]
Revenues
Revenues	$ 410,947	$ 470,658	$ 1,265,470	$ 1,437,780
Cost of revenues
Cost of revenues	306,168	358,297	908,923	1,072,271
Service [Member]
Revenues
Revenues	76,002	69,526	230,465	210,413
Cost of revenues
Cost of revenues	$ 45,818	$ 38,636	$ 135,130	$ 122,588