Business and Basis of Presentation	9 Months Ended
Dec. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business and Basis of Presentation	Business and Basis of Presentation Business Black Box Corporation ("Black Box," or "the Company”) is a leading digital solutions provider dedicated to helping customers design, build, manage, and secure their IT infrastructure. The Company offers Services and Products that it distributes through two platforms it has built over its 41-year history. The Services platform is comprised of engineering and design, network operations centers, technical certifications, national and international sales teams, remote monitoring, on-site service teams and technology partner centers of excellence which includes dedicated sales and engineering resources. The primary services offered through this platform include: (i) communications lifecycle services, (ii) unified communications, (iii) structured cabling, (iv) video/AV services (v) in-building wireless and (vi) data center services. The Products platform provides networking solutions through the sale of products including: (i) IT infrastructure, (ii) specialty networking, (iii) multimedia and (iv) keyboard/video/mouse ("KVM") switching. Founded in 1976, Black Box, a Delaware corporation, is headquartered near Pittsburgh in Lawrence, Pennsylvania. Basis of Presentation The accompanying unaudited interim consolidated financial statements of Black Box have been prepared in accordance with accounting principles generally accepted in the United States ("GAAP") and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. The Company believes that these consolidated financial statements reflect all normal, recurring adjustments needed to present fairly the Company’s results for the interim periods presented. The results as of and for interim periods presented may not be indicative of the results of operations for any other interim period or for the full year. These financial statements should be read in conjunction with the financial statements and notes thereto included in the Company’s most recent Annual Report on Form 10-K as filed with the Securities and Exchange Commission ("SEC") for the fiscal year ended March 31, 2017 (the "Form 10-K"). The Company’s fiscal year ends on March 31. The fiscal quarters consist of 13 weeks and end on the Saturday generally nearest each calendar quarter end, adjusted to provide relatively equivalent business days for each fiscal quarter. The actual ending dates for the periods presented in these Notes to the Consolidated Financial Statements as of December 31, 2017 and 2016 were December 30, 2017 and December 31, 2016, respectively. References herein to "Fiscal Year" or "Fiscal" mean the Company’s fiscal year ended March 31 for the year referenced. All references to dollar amounts herein are presented in thousands, except per share amounts, unless otherwise noted. The consolidated financial statements include the accounts of the parent company and its wholly-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation. Certain items in the consolidated financial statements of prior years have been reclassified to conform to the current year’s presentation. These reclassifications had no effect on reported net income (loss), comprehensive income (loss), cash flows, total assets or total stockholders' equity. The preparation of financial statements in conformity with GAAP requires Company management ("Management") to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Significant estimates in these financial statements include project progress towards completion to estimated budget, allowances for doubtful accounts receivable, sales returns, net realizable value of inventories, loss contingencies, warranty reserves, property, plant and equipment, intangible assets and goodwill. Actual results could differ from those estimates. Management believes the estimates made are reasonable. In the second quarter of Fiscal 2018, Management completed a plan to sell the Company's current headquarters' building and adjacent vacant land and move to another local facility that better aligns to the needs of the business. At that time, Management believed it was probable that the sale of the building and land would occur in the next twelve months. As of the third quarter of Fiscal 2018, Management believes that only the sale of certain parcels of the adjacent vacant land is probable to occur in the next twelve months. These assets, all of which are Property, plant and equipment, are presented as "Assets held for sale" on the Consolidated Balance Sheet. These assets are reported under the North America Products operating segment.

Business and Basis of Presentation

Business

Black Box Corporation ("Black Box," or "the Company”) is a leading digital solutions provider dedicated to helping customers design, build, manage, and secure their IT infrastructure. The Company offers Services and Products that it distributes through two platforms it has built over its 41-year history. The Services platform is comprised of engineering and design, network operations centers, technical certifications, national and international sales teams, remote monitoring, on-site service teams and technology partner centers of excellence which includes dedicated sales and engineering resources. The primary services offered through this platform include: (i) communications lifecycle services, (ii) unified communications, (iii) structured cabling, (iv) video/AV services (v) in-building wireless and (vi) data center services. The Products platform provides networking solutions through the sale of products including: (i) IT infrastructure, (ii) specialty networking, (iii) multimedia and (iv) keyboard/video/mouse ("KVM") switching. Founded in 1976, Black Box, a Delaware corporation, is headquartered near Pittsburgh in Lawrence, Pennsylvania.

Basis of Presentation

The accompanying unaudited interim consolidated financial statements of Black Box have been prepared in accordance with accounting principles generally accepted in the United States ("GAAP") and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. The Company believes that these consolidated financial statements reflect all normal, recurring adjustments needed to present fairly the Company’s results for the interim periods presented. The results as of and for interim periods presented may not be indicative of the results of operations for any other interim period or for the full year. These financial statements should be read in conjunction with the financial statements and notes thereto included in the Company’s most recent Annual Report on Form 10-K as filed with the Securities and Exchange Commission ("SEC") for the fiscal year ended March 31, 2017 (the "Form 10-K").

The Company’s fiscal year ends on March 31. The fiscal quarters consist of 13 weeks and end on the Saturday generally nearest each calendar quarter end, adjusted to provide relatively equivalent business days for each fiscal quarter. The actual ending dates for the periods presented in these Notes to the Consolidated Financial Statements as of December 31, 2017 and 2016 were December 30, 2017 and December 31, 2016, respectively. References herein to "Fiscal Year" or "Fiscal" mean the Company’s fiscal year ended March 31 for the year referenced. All references to dollar amounts herein are presented in thousands, except per share amounts, unless otherwise noted.

The consolidated financial statements include the accounts of the parent company and its wholly-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation. Certain items in the consolidated financial statements of prior years have been reclassified to conform to the current year’s presentation. These reclassifications had no effect on reported net income (loss), comprehensive income (loss), cash flows, total assets or total stockholders' equity.

The preparation of financial statements in conformity with GAAP requires Company management ("Management") to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Significant estimates in these financial statements include project progress towards completion to estimated budget, allowances for doubtful accounts receivable, sales returns, net realizable value of inventories, loss contingencies, warranty reserves, property, plant and equipment, intangible assets and goodwill. Actual results could differ from those estimates. Management believes the estimates made are reasonable.

In the second quarter of Fiscal 2018, Management completed a plan to sell the Company's current headquarters' building and adjacent vacant land and move to another local facility that better aligns to the needs of the business. At that time, Management believed it was probable that the sale of the building and land would occur in the next twelve months. As of the third quarter of Fiscal 2018, Management believes that only the sale of certain parcels of the adjacent vacant land is probable to occur in the next twelve months. These assets, all of which are Property, plant and equipment, are presented as "Assets held for sale" on the Consolidated Balance Sheet. These assets are reported under the North America Products operating segment.