SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	3 Months Ended
Mar. 31, 2018
Accounting Policies [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements There have been no recent accounting pronouncements not yet adopted by the Company which would have a material impact on the Company’s financial statements. Revenue from Contracts with Customers. In May 2014, the FASB issued Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (Topic 606), or ASU 2014-09, which supersedes nearly all existing revenue recognition guidance under U.S. GAAP. Since then, the FASB has also issued ASU 2016-08, Revenue from Contracts with Customers (Topic 606), Principals versus Agent Considerations, ASU 2016-10, Revenue from Contracts with Customers (Topic 606), Identifying Performance Obligations and Licensing, and ASU 2017-13, Revenue Recognition (Topic 605), Revenue from Contracts with Customers (Topic 606), Leases (Topic 840), and Leases (Topic 842), Amendments to SEC Paragraphs Pursuant to the Staff Announcement at the July 20, 2017 EITF Meeting and Recession of Prior SEC Staff Announcements and Observer Comments, which further elaborate on the original ASU No. 2014-09. The core principle of these updates is to recognize revenues when promised goods or services are transferred to customers in an amount that reflects the consideration to which an entity expects to be entitled for those goods or services. ASU 2014-09 defines a five step process to achieve this core principle and, in doing so, more judgments and estimates may be required within the revenue recognition process than were required under previously existing U.S. GAAP. In July 2015, the FASB approved a one-year deferral of the effective date to January 1, 2018, with early adoption to be permitted as of the original effective date of January 1, 2017. Companies may use either of the following transition methods to adopt this standard: (i) a full retrospective approach reflecting the application of the standard in each prior reporting period with the option to elect certain practical expedients; or (ii) a retrospective approach with the cumulative effect of initially adopting ASU 2014-09 recognized at the date of adoption (which includes additional footnote disclosures) (the “modified retrospective approach”). We completed a review of our various revenue streams within our two reportable segments: (i) T&D Solutions and (ii) Critical Power. We have gathered data to quantify the amount of sales by type of revenue stream and categorized the types of sales for our business units for the purpose of comparing how we recognized revenue to the new standard in order to quantify the impact of this ASU. We generally anticipate having substantially similar performance obligations under the new guidance when compared to previously existing U.S. GAAP. We have made policy elections within the amended standard that are consistent with our existing accounting. We adopted ASU 2014-09 in our first quarter of 2018 using the modified retrospective approach. We have performed a quantitative assessment of adopting ASU 2014-09 and concluded that there is no material impact to our financial statements other than enhanced disclosures and there are no changes to the opening retained earnings balance. Income Taxes. In October 2016, the FASB issued ASU No. 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory. ASU No. 2016-16 requires the income tax consequences of intra-entity transfers of assets other than inventory to be recognized when the intra-entity transfer occurs rather than deferring recognition of income tax consequences until the transfer was made with an outside party. We adopted ASU 2016-16 in the first quarter of 2018 using a modified retrospective approach. Adoption of the new standard did not have a material impact on our Consolidated Financial Statements. Retirement Standard. In March 2017, the FASB issued ASU No. 2017-07 Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. We adopted Accounting Standards Update No. 2017-07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost (the “New Retirement Standard”), effective January 1, 2018 using the full-retrospective method. The New Retirement Standard requires employers to present the service cost component of the net periodic benefit cost in the same income statement line item as other employee compensation costs arising from services rendered during the period. The other components of net benefit cost, including interest cost, expected return on plan assets, amortization of prior service cost/credit and actuarial gain/loss, and settlement and curtailment effects, are to be presented outside of any subtotal of operating income. The Company elected to apply the practical expedient and use the amounts disclosed in Note 11 to the financial statements included in Part I, Item 1 of the Company’s Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2017 as the estimation basis for applying the retrospective presentation requirements of the standard. Leases. In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842), which requires, among other things, a lessee to recognize a liability representing future lease payments and a right-of-use asset representing its right to use the underlying asset for the lease term. For operating leases, a lessee will be required to recognize at inception a right-of-use asset and a lease liability equal to the net present value of the lease payments, with lease expense recognized over the lease term on a straight-line basis. For leases with a term of twelve months or less, ASU 2016-02 allows a reporting entity to make an accounting policy election to not recognize a right-of-use asset and a lease liability, and to recognize lease expense on a straight-line basis. ASU No. 2016-02 is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, with early adoption permitted. Upon adoption, a reporting entity should apply the provisions of ASU 2016-02 at the beginning of the earliest period presented using a modified retrospective approach, which includes certain optional practical expedients that an entity may elect to apply. We adopted this standard in our first quarter of 2018 using the modified retrospective approach. As a result, the opening retained earnings for January 1, 2017 was reduced by approximately $0.1 million. There was also an increase in assets and corresponding liabilities of approximately $5.3 and $5.2 million, respectively, at January 1, 2017. Statement of Cash Flows. In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. The purpose of Update No. 2016-15 is to reduce the diversity in practice in presentation and classification of the following items within the statement of cash flows: debt prepayments or debt extinguishment costs, settlement of zero coupon debt instruments or other debt instruments with coupon interest rates that are insignificant in relation to the effective interest rate of the borrowing, contingent consideration payments made after a business combination, proceeds from the settlement of insurance claims, proceeds from the settlement of corporate-owned life insurance policies, distributions received from equity method investments and beneficial interests in securitization transactions. It also addresses classification of transactions that have characteristics of more than one class of cash flows. Update No. 2016-15 is effective for annual periods beginning after December 15, 2017, and a retrospective transition method is required. We adopted ASU 2016-15 in our first quarter of 2018 using the retrospective approach. The adoption of ASU 2016-15 did not have a material impact on our consolidated statements of cash flows.

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)

3 Months Ended

Mar. 31, 2018

Recent Accounting Pronouncements

There have been no recent accounting pronouncements not yet adopted by the Company which would have a material impact on the Company’s financial statements.

Revenue from Contracts with Customers. In May 2014, the FASB issued Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (Topic 606), or ASU 2014-09, which supersedes nearly all existing revenue recognition guidance under U.S. GAAP. Since then, the FASB has also issued ASU 2016-08, Revenue from Contracts with Customers (Topic 606), Principals versus Agent Considerations, ASU 2016-10, Revenue from Contracts with Customers (Topic 606), Identifying Performance Obligations and Licensing, and ASU 2017-13, Revenue Recognition (Topic 605), Revenue from Contracts with Customers (Topic 606), Leases (Topic 840), and Leases (Topic 842), Amendments to SEC Paragraphs Pursuant to the Staff Announcement at the July 20, 2017 EITF Meeting and Recession of Prior SEC Staff Announcements and Observer Comments, which further elaborate on the original ASU No. 2014-09. The core principle of these updates is to recognize revenues when promised goods or services are transferred to customers in an amount that reflects the consideration to which an entity expects to be entitled for those goods or services. ASU 2014-09 defines a five step process to achieve this core principle and, in doing so, more judgments and estimates may be required within the revenue recognition process than were required under previously existing U.S. GAAP. In July 2015, the FASB approved a one-year deferral of the effective date to January 1, 2018, with early adoption to be permitted as of the original effective date of January 1, 2017. Companies may use either of the following transition methods to adopt this standard: (i) a full retrospective approach reflecting the application of the standard in each prior reporting period with the option to elect certain practical expedients; or (ii) a retrospective approach with the cumulative effect of initially adopting ASU 2014-09 recognized at the date of adoption (which includes additional footnote disclosures) (the “modified retrospective approach”). We completed a review of our various revenue streams within our two reportable segments: (i) T&D Solutions and (ii) Critical Power. We have gathered data to quantify the amount of sales by type of revenue stream and categorized the types of sales for our business units for the purpose of comparing how we recognized revenue to the new standard in order to quantify the impact of this ASU. We generally anticipate having substantially similar performance obligations under the new guidance when compared to previously existing U.S. GAAP. We have made policy elections within the amended standard that are consistent with our existing accounting. We adopted ASU 2014-09 in our first quarter of 2018 using the modified retrospective approach. We have performed a quantitative assessment of adopting ASU 2014-09 and concluded that there is no material impact to our financial statements other than enhanced disclosures and there are no changes to the opening retained earnings balance.

Income Taxes. In October 2016, the FASB issued ASU No. 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory. ASU No. 2016-16 requires the income tax consequences of intra-entity transfers of assets other than inventory to be recognized when the intra-entity transfer occurs rather than deferring recognition of income tax consequences until the transfer was made with an outside party. We adopted ASU 2016-16 in the first quarter of 2018 using a modified retrospective approach. Adoption of the new standard did not have a material impact on our Consolidated Financial Statements.

Retirement Standard. In March 2017, the FASB issued ASU No. 2017-07 Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. We adopted Accounting Standards Update No. 2017-07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost (the “New Retirement Standard”), effective January 1, 2018 using the full-retrospective method. The New Retirement Standard requires employers to present the service cost component of the net periodic benefit cost in the same income statement line item as other employee compensation costs arising from services rendered during the period. The other components of net benefit cost, including interest cost, expected return on plan assets, amortization of prior service cost/credit and actuarial gain/loss, and settlement and curtailment effects, are to be presented outside of any subtotal of operating income. The Company elected to apply the practical expedient and use the amounts disclosed in Note 11 to the financial statements included in Part I, Item 1 of the Company’s Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2017 as the estimation basis for applying the retrospective presentation requirements of the standard.

Leases. In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842), which requires, among other things, a lessee to recognize a liability representing future lease payments and a right-of-use asset representing its right to use the underlying asset for the lease term. For operating leases, a lessee will be required to recognize at inception a right-of-use asset and a lease liability equal to the net present value of the lease payments, with lease expense recognized over the lease term on a straight-line basis. For leases with a term of twelve months or less, ASU 2016-02 allows a reporting entity to make an accounting policy election to not recognize a right-of-use asset and a lease liability, and to recognize lease expense on a straight-line basis. ASU No. 2016-02 is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, with early adoption permitted. Upon adoption, a reporting entity should apply the provisions of ASU 2016-02 at the beginning of the earliest period presented using a modified retrospective approach, which includes certain optional practical expedients that an entity may elect to apply. We adopted this standard in our first quarter of 2018 using the modified retrospective approach. As a result, the opening retained earnings for January 1, 2017 was reduced by approximately $0.1 million. There was also an increase in assets and corresponding liabilities of approximately $5.3 and $5.2 million, respectively, at January 1, 2017.

Statement of Cash Flows. In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. The purpose of Update No. 2016-15 is to reduce the diversity in practice in presentation and classification of the following items within the statement of cash flows: debt prepayments or debt extinguishment costs, settlement of zero coupon debt instruments or other debt instruments with coupon interest rates that are insignificant in relation to the effective interest rate of the borrowing, contingent consideration payments made after a business combination, proceeds from the settlement of insurance claims, proceeds from the settlement of corporate-owned life insurance policies, distributions received from equity method investments and beneficial interests in securitization transactions. It also addresses classification of transactions that have characteristics of more than one class of cash flows. Update No. 2016-15 is effective for annual periods beginning after December 15, 2017, and a retrospective transition method is required. We adopted ASU 2016-15 in our first quarter of 2018 using the retrospective approach. The adoption of ASU 2016-15 did not have a material impact on our consolidated statements of cash flows.