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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands | Total | Additional Capital | Retained Earnings (Deficit) | Treasury Stock | Noncontrolling Interest | Accumulated Other Comprehensive Income (Loss) | Common Class B | Common Stock
--- | --- | --- | --- | --- | --- | --- | --- | ---
Common Stock, Value, Issued |  |  |  |  |  |  | $ 43 | $ 588
Common Stock, Shares, Issued |  |  |  |  |  |  | 4,339,431 | 58,817,781
Additional Paid in Capital, Common Stock | $ 986,020 |  |  |  |  |  |  |
Retained Earnings (Accumulated Deficit) | 1,914,757 |  |  |  |  |  |  |
Treasury Stock, Value | $ (542,537) |  |  |  |  |  |  |
Treasury Stock, Shares | (14,545,715) |  |  |  |  |  |  |
Stockholders' Equity Attributable to Noncontrolling Interest | $ (3,269) |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax | (391,971) |  |  |  |  |  |  |
Stock Issued, Value, Stock Options Exercised, Net of Tax Benefit (Expense) |  |  |  | $ (4,583) |  |  |  | $ 3
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period |  |  |  | (51,401) |  |  |  | (243,361)
Shares Granted, Value, Share-based Payment Arrangement, after Forfeiture | 14,809 |  |  |  |  |  |  |
APIC, Share-based Payment Arrangement, Recognition and Exercise | (407) |  |  |  |  |  |  |
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation |  | $ (1,304) | $ 1,480 |  |  |  |  | $ 0
Treasury Stock, Value, Acquired, Par Value Method |  | 38 |  |  |  |  |  |
Treasury Stock, Value, Acquired, Cost Method | $ (100,038) |  |  |  |  |  |  |
Treasury Stock, Shares, Acquired | (1,778,537) |  |  |  |  |  |  |
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation |  |  |  |  |  |  |  | (15,380)
Net Income (Loss) Attributable to Noncontrolling Interest | $ 327 |  |  |  | $ 327 |  |  |
Translation adjustment |  |  |  |  |  | $ 85,762 |  |
Benefit plan adjustments | 6,381 |  |  |  |  | (6,381) |  |
Net Income attributable to WESCO International, Inc. | 163,460 |  |  |  |  |  |  |
Common Stock, Value, Issued |  |  |  |  |  |  | $ 43 | $ 591
Common Stock, Shares, Issued |  |  |  |  |  |  | 4,339,431 | 59,045,762
Additional Paid in Capital, Common Stock | 999,156 |  |  |  |  |  |  |
Retained Earnings (Accumulated Deficit) | 2,079,697 |  |  |  |  |  |  |
Treasury Stock, Value | $ (647,158) |  |  |  |  |  |  |
Treasury Stock, Shares | (16,375,653) |  |  |  |  |  |  |
Stockholders' Equity Attributable to Noncontrolling Interest | $ (3,596) |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax | (312,590) |  |  |  |  |  |  |
Stock Issued, Value, Stock Options Exercised, Net of Tax Benefit (Expense) |  |  |  | $ (841) |  |  |  | $ 1
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period |  |  |  | (11,943) |  |  |  | (130,371)
Shares Granted, Value, Share-based Payment Arrangement, after Forfeiture | 10,790 |  |  |  |  |  |  |
APIC, Share-based Payment Arrangement, Recognition and Exercise | (45) |  |  |  |  |  |  |
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation |  | (1,254) | 422 |  |  |  |  | $ 0
Treasury Stock, Value, Acquired, Par Value Method |  | (14,981) |  |  |  |  |  |
Treasury Stock, Value, Acquired, Cost Method | $ (110,019) |  |  |  |  |  |  |
Treasury Stock, Shares, Acquired | (2,003,446) |  |  |  |  |  |  |
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation |  |  |  |  |  |  |  | (18,437)
Net Income (Loss) Attributable to Noncontrolling Interest | $ 1,988 |  |  |  | 1,988 |  |  |
Translation adjustment |  |  |  |  |  | (99,643) |  |
Benefit plan adjustments | (3,798) |  |  |  |  | 3,798 |  |
Stockholders' equity at period end at Dec. 31, 2018 | 2,129,726 |  |  |  |  |  |  |
Net Income attributable to WESCO International, Inc. | 227,343 |  |  |  |  |  |  |
Common Stock, Value, Issued |  |  |  |  |  |  | $ 43 | $ 592
Common Stock, Shares, Issued |  |  |  |  |  |  | 4,339,431 | 59,157,696
Additional Paid in Capital, Common Stock | 993,666 |  |  |  |  |  |  |
Retained Earnings (Accumulated Deficit) | 2,307,462 |  |  |  |  |  |  |
Treasury Stock, Value | $ (758,018) |  |  |  |  |  |  |
Treasury Stock, Shares | (18,391,042) |  |  |  |  |  |  |
Stockholders' Equity Attributable to Noncontrolling Interest | $ (5,584) |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax | (408,435) |  |  |  |  |  |  |
Stock Issued, Value, Stock Options Exercised, Net of Tax Benefit (Expense) |  |  |  | $ (238) |  |  |  | $ 1
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period |  |  |  | (3,730) |  |  |  | (198,985)
Shares Granted, Value, Share-based Payment Arrangement, after Forfeiture | 19,062 |  |  |  |  |  |  |
APIC, Share-based Payment Arrangement, Recognition and Exercise | (84) |  |  |  |  |  |  |
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation |  | (2,198) | $ (459) |  |  |  |  | $ 0
Treasury Stock, Value, Acquired, Par Value Method |  | $ 28,901 |  |  |  |  |  |
Treasury Stock, Value, Acquired, Cost Method | $ (178,901) |  |  |  |  |  |  |
Treasury Stock, Shares, Acquired | (3,455,584) |  |  |  |  |  |  |
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation |  |  |  |  |  |  |  | (48,663)
Net Income (Loss) Attributable to Noncontrolling Interest | $ 1,228 |  |  |  | $ 1,228 |  |  |
Translation adjustment |  |  |  |  |  | 49,306 |  |
Benefit plan adjustments | 8,643 |  |  |  |  | $ (8,643) |  |
Stockholders' equity at period end at Dec. 31, 2019 | 2,258,671 |  |  |  |  |  |  |
Net Income attributable to WESCO International, Inc. | 223,426 |  |  |  |  |  |  |
Common Stock, Value, Issued |  |  |  |  |  |  | $ 43 | $ 593
Common Stock, Shares, Issued |  |  |  |  |  |  | 4,339,431 | 59,308,018
Additional Paid in Capital, Common Stock | 1,039,347 |  |  |  |  |  |  |
Retained Earnings (Accumulated Deficit) | 2,530,429 |  |  |  |  |  |  |
Treasury Stock, Value | $ (937,157) |  |  |  |  |  |  |
Treasury Stock, Shares | (21,850,356) |  |  |  |  |  |  |
Stockholders' Equity Attributable to Noncontrolling Interest | $ (6,812) |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax | $ (367,772) |  |  |  |  |  |  |

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