INCOME TAX	6 Months Ended
Jun. 30, 2018
Income Tax Disclosure [Abstract]
INCOME TAXES	11. INCOME TAX For interim income tax reporting the Company estimates its annual effective tax rate and applies this effective tax rate to its year-to-date pre-tax income (loss). For the six months ended June 30, 2018 and 2017, the effective tax rate differed from the statutory rate primarily due to the U.S. and Canadian valuation allowances. The Tax Cuts and Jobs Act The Tax Cuts and Jobs Act (the "Act") was signed into law on December 22, 2017. The most significant impacts of the Act to the Company include a reduction in the federal corporate income tax rate from 35% to 21%, effective January 1, 2018, and a one-time, mandatory transition tax on deemed repatriation of previously tax-deferred and unremitted foreign earnings. In accordance with ASU 2018-05 and Staff Accounting Bulletin 118, the Company recognized the provisional tax impacts related to the re-measurement of our deferred income tax assets and liabilities and the one-time, mandatory transition tax on deemed repatriation during the year ended December 31, 2017. As of June 30, 2018, we have not made any additional measurement-period adjustments related to these items. Such adjustments may be necessary in future periods due to, among other things, the significant complexity of the Act and anticipated additional regulatory guidance that may be issued by the Internal Revenue Service (“IRS”), changes in analysis, interpretations and assumptions the Company has made and actions the Company may take as a result of the Act. We are continuing to gather information to assess the application of the Act and expect to complete our analysis with the filing of our 2017 income tax returns during the third quarter of 2018. Tax Benefits Preservation Plan As of December 31, 2017, WCC had a U.S. federal net operating loss carryforward of $676.2 million, together with certain other tax attributes. WCC's ability to utilize these deferred tax assets to offset future taxable income may be significantly limited if WCC experiences an "ownership change," as defined in Section 382 of the Internal Revenue Code of 1986, as amended (the "Code"). In general, an ownership change will occur if the percentage of the stock owned cumulatively by one or more “5% shareholders” (as defined in the Code) has increased by more than 50 percentage points over the lowest percentage of stock owned by such shareholders at any time over a rolling three-year period. On September 2, 2017, the board of directors of WCC adopted a tax benefits preservation plan or stockholder rights plan (the "Plan"). The purpose of the Plan is to minimize the likelihood of an ownership change occurring for Section 382 purposes and thus protect WCC's ability to utilize certain net operating loss carryovers and other tax benefits of the Company and its subsidiaries (the “Tax Benefits”) to offset future income. The Plan is intended to act as a deterrent to any person or group acquiring “beneficial ownership” (within the meaning of applicable SEC rules) of 4.75% or more of the outstanding shares of WCC's common stock without the approval of the board of directors. The description and terms of the Rights (as defined below) applicable to the Plan are set forth in the 382 Rights Agreement, dated as of September 5, 2017 (the “Rights Agreement”), by and between WCC and Broadridge Corporate Issuer Solutions, Inc., as Rights Agent. As part of the Rights Agreement, the board of directors authorized and declared a dividend distribution of one right (a “Right”) for each outstanding share of common stock to stockholders of record at the close of business on September 18, 2017. Each Right entitles the holder to purchase from WCC a unit consisting of one ten thousandth of a share (a “Unit”) of Series A Participating Preferred Stock, par value $0.01 per share, of WCC at a purchase price of $10.00 per Unit, subject to adjustment. Until a Right is exercised, the holder thereof, as such, will have no separate rights as a stockholder of WCC, including the right to vote or to receive dividends in respect of Rights.

11. INCOME TAX

For interim income tax reporting the Company estimates its annual effective tax rate and applies this effective tax rate to its year-to-date pre-tax income (loss). For the six months ended June 30, 2018 and 2017, the effective tax rate differed from the statutory rate primarily due to the U.S. and Canadian valuation allowances.

The Tax Cuts and Jobs Act

The Tax Cuts and Jobs Act (the "Act") was signed into law on December 22, 2017. The most significant impacts of the Act to the Company include a reduction in the federal corporate income tax rate from 35% to 21%, effective January 1, 2018, and a one-time, mandatory transition tax on deemed repatriation of previously tax-deferred and unremitted foreign earnings.

In accordance with ASU 2018-05 and Staff Accounting Bulletin 118, the Company recognized the provisional tax impacts related to the re-measurement of our deferred income tax assets and liabilities and the one-time, mandatory transition tax on deemed repatriation during the year ended December 31, 2017. As of June 30, 2018, we have not made any additional measurement-period adjustments related to these items. Such adjustments may be necessary in future periods due to, among other things, the significant complexity of the Act and anticipated additional regulatory guidance that may be issued by the Internal Revenue Service (“IRS”), changes in analysis, interpretations and assumptions the Company has made and actions the Company may take as a result of the Act. We are continuing to gather information to assess the application of the Act and expect to complete our analysis with the filing of our 2017 income tax returns during the third quarter of 2018.

Tax Benefits Preservation Plan

As of December 31, 2017, WCC had a U.S. federal net operating loss carryforward of $676.2 million, together with certain other tax attributes. WCC's ability to utilize these deferred tax assets to offset future taxable income may be significantly limited if WCC experiences an "ownership change," as defined in Section 382 of the Internal Revenue Code of 1986, as amended (the "Code"). In general, an ownership change will occur if the percentage of the stock owned cumulatively by one or more “5% shareholders” (as defined in the Code) has increased by more than 50 percentage points over the lowest percentage of stock owned by such shareholders at any time over a rolling three-year period.

On September 2, 2017, the board of directors of WCC adopted a tax benefits preservation plan or stockholder rights plan (the "Plan"). The purpose of the Plan is to minimize the likelihood of an ownership change occurring for Section 382 purposes and thus protect WCC's ability to utilize certain net operating loss carryovers and other tax benefits of the Company and its subsidiaries (the “Tax Benefits”) to offset future income. The Plan is intended to act as a deterrent to any person or group acquiring “beneficial ownership” (within the meaning of applicable SEC rules) of 4.75% or more of the outstanding shares of WCC's common stock without the approval of the board of directors. The description and terms of the Rights (as defined below) applicable to the Plan are set forth in the 382 Rights Agreement, dated as of September 5, 2017 (the “Rights Agreement”), by and between WCC and Broadridge Corporate Issuer Solutions, Inc., as Rights Agent.

As part of the Rights Agreement, the board of directors authorized and declared a dividend distribution of one right (a “Right”) for each outstanding share of common stock to stockholders of record at the close of business on September 18, 2017. Each Right entitles the holder to purchase from WCC a unit consisting of one ten thousandth of a share (a “Unit”) of Series A Participating Preferred Stock, par value $0.01 per share, of WCC at a purchase price of $10.00 per Unit, subject to adjustment. Until a Right is exercised, the holder thereof, as such, will have no separate rights as a stockholder of WCC, including the right to vote or to receive dividends in respect of Rights.