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Consolidated Statements of Equity - USD ($) $ in Thousands | Total | Common Stock [Member] | Common Stock Including Additional Paid in Capital [Member] | AOCI Attributable to Parent [Member] | Retained Earnings (Accumulated Deficit) [Member] | Total Itron Inc. Shareholders' Equity [Member] | Noncontrolling Interests [Member] | SIlver Spring Networks, Inc. [Member] | SIlver Spring Networks, Inc. [Member] Common Stock Including Additional Paid in Capital [Member] | SIlver Spring Networks, Inc. [Member] Total Itron Inc. Shareholders' Equity [Member]
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Cumulative effect of accounting change | Accounting Standards Update 2016-09 [Member] | $ 11,727 |  | $ 0 |  | $ 11,727 | $ 11,727 |  |  |  |
Balance (in shares) at Dec. 31, 2017 |  | 38,771,000 |  |  |  |  |  |  |  |
Balance (value) at Dec. 31, 2017 | 805,632 |  | 1,294,767 | $ (170,478) | (337,873) | 786,416 | $ 19,216 |  |  |
Net income (loss) | (96,581) |  |  |  | (99,250) | (99,250) | 2,669 |  |  |
Other comprehensive income (loss), net of tax | (25,827) |  |  | (25,827) |  | (25,827) | 0 |  |  |
Distributions to noncontrolling interests | (500) |  |  |  |  |  | (500) |  |  |
Options exercised (in shares) |  | 152,000 |  |  |  |  |  |  |  |
Options exercised (value) | 5,935 |  | 5,935 |  |  | 5,935 |  |  |  |
Restricted stock awards released (in shares) |  | 517,000 |  |  |  |  |  |  |  |
Restricted stock awards released (value) | 0 |  | 0 |  |  | 0 |  |  |  |
Issuance of stock-based compensation awards (in shares) |  | 10,000 |  |  |  |  |  |  |  |
Issuance of stock-based compensation awards (value) | 729 |  | 729 |  |  | 729 |  |  |  |
Employee stock purchase plan (in shares) |  | 48,000 |  |  |  |  |  |  |  |
Employee stock purchase plan (value) | 2,974 |  | 2,974 |  |  | 2,974 |  |  |  |
Stock-based compensation expense | 30,534 |  | 30,534 |  |  | 30,534 |  |  |  |
Registration fee | (22) |  | (22) |  |  | (22) |  |  |  |
Stock repurchased |  |  |  |  |  |  |  | $ (553) | $ (553) | $ (553)
Balance (in shares) at Dec. 31, 2018 |  | 39,498,000 |  |  |  |  |  |  |  |
Balance (value) at Dec. 31, 2018 | 734,048 |  | 1,334,364 | (196,305) | (425,396) | 712,663 | 21,385 |  |  |
Net income (loss) | 52,415 |  |  |  | 49,006 | 49,006 | 3,409 |  |  |
Other comprehensive income (loss), net of tax | (8,367) |  |  | (8,367) |  | (8,367) | 0 |  |  |
Distributions to noncontrolling interests | (517) |  |  |  |  |  | (517) |  |  |
Options exercised (in shares) |  | 489,000 |  |  |  |  |  |  |  |
Options exercised (value) | 21,289 |  | 21,289 |  |  | 21,289 |  |  |  |
Restricted stock awards released (in shares) |  | 415,000 |  |  |  |  |  |  |  |
Restricted stock awards released (value) | (3,113) |  | (3,113) |  |  | (3,113) |  |  |  |
Issuance of stock-based compensation awards (in shares) |  | 9,000 |  |  |  |  |  |  |  |
Issuance of stock-based compensation awards (value) | 630 |  | 630 |  |  | 630 |  |  |  |
Employee stock purchase plan (in shares) |  | 59,000 |  |  |  |  |  |  |  |
Employee stock purchase plan (value) | 3,100 |  | 3,100 |  |  | 3,100 |  |  |  |
Stock-based compensation expense | $ 26,330 |  | 26,330 |  |  | 26,330 |  |  |  |
Balance (in shares) at Dec. 31, 2019 | 39,941,000 | 39,941,000 |  |  |  |  |  |  |  |
Balance (value) at Dec. 31, 2019 | $ 800,815 |  | 1,357,600 | (204,672) | (376,390) | 776,538 | 24,277 |  |  |
Stock Repurchased During Period, Shares | (529,396) | (529,000) |  |  |  |  |  |  |  |
Stock Repurchased During Period, Value | $ (25,000) |  | (25,000) |  |  | (25,000) |  |  |  |
Net income (loss) | (56,877) |  |  |  | (57,955) | (57,955) | 1,078 |  |  |
Other comprehensive income (loss), net of tax | 66,146 |  |  | 66,146 |  | 66,146 | 0 |  |  |
Distributions to noncontrolling interests | (1,630) |  |  |  |  |  | (1,630) |  |  |
Options exercised (in shares) |  | 103,000 |  |  |  |  |  |  |  |
Options exercised (value) | 5,551 |  | 5,551 |  |  | 5,551 |  |  |  |
Restricted stock awards released (in shares) |  | 334,000 |  |  |  |  |  |  |  |
Restricted stock awards released (value) | (2,120) |  | (2,120) |  |  | (2,120) |  |  |  |
Issuance of stock-based compensation awards (in shares) |  | 12,000 |  |  |  |  |  |  |  |
Issuance of stock-based compensation awards (value) | 824 |  | 824 |  |  | 824 |  |  |  |
Employee stock purchase plan (in shares) |  | 54,000 |  |  |  |  |  |  |  |
Employee stock purchase plan (value) | 3,335 |  | 3,335 |  |  | 3,335 |  |  |  |
Stock-based compensation expense | $ 24,229 |  | 24,229 |  |  | 24,229 |  |  |  |
Balance (in shares) at Dec. 31, 2020 | 40,444,000 | 40,444,000 |  |  |  |  |  |  |  |
Balance (value) at Dec. 31, 2020 | $ 840,273 |  | $ 1,389,419 | $ (138,526) | $ (434,345) | $ 816,548 | $ 23,725 |  |  |

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