Business and Basis of Presentation (Policies)	9 Months Ended
Business and Basis of Presentation (Policies)	Mar. 31, 2016
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying condensed consolidated financial statements include all the accounts of the Company and its wholly-owned subsidiaries. All inter-company accounts and transactions have been eliminated in consolidation. The accompanying condensed consolidated financial statements and related notes are unaudited and have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) for interim financial reporting and pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”) for quarterly reports on Form 10-Q, and do not include all of the note disclosures required by GAAP for complete financial statements. These condensed consolidated financial statements should, therefore, be read in conjunction with the consolidated financial statements and notes thereto for the year ended June 30, 2015 included in the Company’s Annual Report on Form 10-K for the year ended June 30, 2015. In the opinion of management, all adjustments considered necessary for a fair presentation of financial position, results of operations and cash flows of the Company have been included herein. The results of operations for the three and nine months periods ended March 31, 2016 are not necessarily indicative of the operating results for any future interim period or the full year. The Company’s fiscal year ends June 30 each year, and we refer to the fiscal year ended June 30, 2015 as “Fiscal 2015” and the fiscal year ending June 30, 2016 as “Fiscal 2016.”
Earnings or Loss per Share	Earnings or Loss per Share Basic earnings or loss per share attributable to the Company’s common shareholders is computed by dividing net earnings or loss attributable to common shareholders by the weighted average number of common shares outstanding for the period. Diluted earnings or loss per share attributable to common shareholders presents the dilutive effect, if any, on a per share basis of potential common shares (such as restricted stock units) as if they had been vested or converted during the periods presented. No such items were included in the computation of diluted loss per share for the three and nine months ended March 31, 2016 and 2015, as the Company incurred a loss from operations in those periods and the effect of inclusion would have been anti-dilutive.
Employee Benefits	Employee Benefits As a result of the Allstream acquisition (see Note 2 – Acquisitions) the Company acquired certain defined benefit pension plans, a defined contribution plan and other non-pension post-employment plans. The cost of providing benefits under the defined benefit pension plans and other non-pension post-employment benefits is determined annually using the projected unit credit method. These actuarial valuations require the use of assumptions, including the discount rate and expected future salary increases to measure defined benefit obligations. The discount rate used to calculate the present values of the defined benefit obligation is determined by reference to market interest rates of high quality corporate bonds at the end of the reporting period. The net defined benefit liability (asset) recognized in our condensed consolidated balance sheet comprises the present value of the defined benefit obligations less the fair value of plan assets. Remeasurements of the net defined benefit liability (asset) are recognized immediately in other comprehensive loss. At each interim reporting period, the Company estimates actuarial gains and losses resulting from changes in the discount rate used to calculate the present value of the defined benefit pension obligations, and recognizes the actual return on plan assets excluding amounts included in net interest on the net defined benefit liability (asset). At year-end, all actuarial gains and losses arising from changes in the present value of the defined benefit obligations, and the changes in the fair value of plan assets, are determined in an accounting valuation prepared by an independent actuary. For funded defined benefit plans, when a net defined benefit asset is recognized, it is limited to the present value of the economic benefit in the form of reductions in future contributions to the plan. Any minimum funding requirements are considered in the calculation of the economic benefit. For plans recognized by a net defined benefit liability, minimum funding requirements can also result in an increase in the liability. An economic benefit is available to the Company if it is realizable during the life of the plan, or on settlement of the plan liabilities. The Company recognizes any decrease in an asset or increase in a liability as a result of the above in other comprehensive loss. The Company recognizes payments to the defined contribution plans as an expense in the period the employee service is incurred.
Use of Estimates	Use of Estimates The preparation of the Company’s condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expense during the reporting period. Significant estimates are used when establishing allowances for doubtful accounts and accruals for billing disputes, determining useful lives for depreciation and amortization and accruals for exit activities associated with real estate leases, assessing the need for impairment charges (including those related to intangible assets and goodwill), determining the fair values of assets acquired and liabilities assumed in business combinations, accounting for income taxes and related valuation allowances against deferred tax assets, determining the defined benefit costs and defined benefit obligations related to post-employment benefits and estimating the restricted stock unit grant fair values used to compute the stock-based compensation liability and expense. Management evaluates these estimates and judgments on an ongoing basis and makes estimates based on historical experience, current conditions, and various other assumptions that are believed to be reasonable under the circumstances. The results of these estimates form the basis for making judgments about the carrying values of assets and liabilities as well as identifying and assessing the accounting treatment with respect to commitments and contingencies. Actual results may differ from these estimates under different assumptions or conditions.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-02, Leases. The new guidance supersedes existing guidance on accounting for leases in Topic 840 and is intended to increase the transparency and comparability of accounting for lease transactions. ASU 2016-02 requires most leases to be recognized on the balance sheet. Lessees will need to recognize a right-of-use asset and a lease liability for virtually all leases. The liability will be equal to the present value of lease payments. The asset will be based on the liability, subject to adjustment, such as for initial direct costs. For income statement purposes, the FASB retained a dual model, requiring leases to be classified as either operating or finance. Lessor accounting remains similar to the current model, but updated to align with certain changes to the lessee model and the new revenue recognition standard (ASU 2014-09). The ASU will require both quantitative and qualitative disclosures regarding key information about leasing arrangements. The standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. Early adoption is permitted. The new standard must be adopted using a modified retrospective transition, and provides for certain practical expedients. Transition will require application of the new guidance at the beginning of the earliest comparative period presented. The Company is evaluating the effect that ASU 2016-02 will have on its consolidated financial statements and related disclosures. The Company has not yet selected a transition method nor has it determined the effect of the standard on its ongoing financial reporting. On March 30, 2016, the FASB issued ASU 2016-09, Improvements to Employee Share-Based Payment Accounting, which is intended to improve the accounting for share-based payment transactions as part of the FASB’s simplification initiative. The ASU changes five aspects of the accounting for share-based payment award transactions that will affect public companies, including: (1) accounting for income taxes; (2) classification of excess tax benefits on the statement of cash flows; (3) forfeitures; (4) minimum statutory tax withholding requirements; and (5) classification of employee taxes paid on the statement of cash flows when an employer withholds shares for tax-withholding purposes. The Company is evaluating the effect that ASU 2016-09 will have on its consolidated financial statements and related disclosures. If adopted in the current fiscal year, among other changes, $7.9 million in excess tax benefits would be reclassified from a financing activity to an operating inflow. In September 2015, the FASB issued ASU 2015-17, Balance Sheet Classification of Deferred Taxes, which requires an entity to present deferred tax liabilities and assets as noncurrent. The ASU will replace the current classification and presentation requirements for deferred tax assets and liabilities. The standard is effective for financial statements issued for annual periods beginning after December 15, 2016. Early adoption is permitted as of the original effective date or annual reporting periods and interim reporting periods within annual reporting periods beginning after December 15, 2016. The Company has not yet adopted ASU 2015-17 and it is not expected to have a material effect on the Company’s financial statements. In September 2015, the FASB issued ASU 2015-16, Simplifying the Accounting for Measurement-Period Adjustments, which requires acquirers who have reported provisional amounts for items in a business combination to recognize adjustments to provisional amounts that are identified during the measurement period, in the reporting period in which the adjustments are determined. The ASU also requires that the acquirer record, in the same period’s financial statements, the effect on earnings of changes in depreciation, amortization, or other income effects, if any, as a result of the change to the provisional amounts, calculated as if the accounting had been completed at the acquisition date. Prior to the issuance of ASU 2015-16, adjustments to provisional amounts were required to be retrospectively adjusted. The Company prospectively early-adopted ASU 2015-16 effective July 1, 2015. The adoption of this standard did not have a material impact on the financial statements. In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers, which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The ASU will replace most existing revenue recognition guidance in GAAP when it becomes effective. In July 2015, the FASB deferred the effective date to annual reporting periods and interim reporting periods within annual reporting periods beginning after December 15, 2017. Early adoption is permitted as of the original effective date or annual reporting periods and interim reporting periods within annual reporting periods beginning after December 15, 2016. The standard permits the use of either the retrospective or cumulative effect transition method. The Company is evaluating the effect that ASU 2014-09 will have on its consolidated financial statements and related disclosures. The Company has not yet selected a transition method nor has it determined the effect of the standard on its ongoing financial reporting.