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SEGMENTS - Reconciliation of Income Before Income Taxes to Segment Adjusted EBITDA (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 4 Months Ended | 6 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Dec. 02, 2016 | Mar. 31, 2017 | Mar. 31, 2016 | Mar. 31, 2017 | Dec. 31, 2016 | Mar. 31, 2017 | Mar. 31, 2016 | Dec. 01, 2016
Segment Reporting [Abstract] |  |  |  |  |  |  |  |
Income before income taxes |  | $ 78,653 | $ 81,100 |  |  | $ 443,697 | $ 226,062 |
Remeasurement gain attributable to acquisition of Innovatix, LLC |  | 0 | 0 |  |  | (204,833) | 0 |
Equity in net income of unconsolidated affiliates |  | (83) | (6,627) |  |  | (14,789) | (16,002) |
Interest and investment loss, net |  | 2,017 | 285 |  |  | 3,026 | 981 |
Loss on disposal of long-lived assets |  | 725 | 0 |  |  | 2,243 | 0 |
Other expense (income), net |  | (2,260) | 0 |  |  | (3,135) | 2,081 |
Operating income |  | 79,052 | 74,758 |  |  | 226,209 | 213,122 |
Depreciation and amortization |  | 15,102 | 13,110 |  |  | 43,318 | 37,174 |
Amortization of purchased intangible assets |  | 14,080 | 8,740 |  |  | 34,440 | 24,058 |
Stock-based compensation |  | 7,157 | 11,839 |  |  | 19,476 | 37,093 |
Acquisition related expenses |  | 4,330 | 2,583 |  |  | 11,483 | 11,699 |
Strategic and financial restructuring expenses |  | 0 | 33 |  |  | 0 | 268 |
Adjustment to tax receivable agreement liability |  | 2,768 | 0 |  |  | (2,954) | (4,818) |
ERP implementation expenses |  | 215 | 1,162 |  |  | 1,741 | 3,240 |
Acquisition related adjustment - revenue |  | 11,765 | 1,077 |  |  | 17,729 | 5,216 |
Equity in net income of unconsolidated affiliates |  | 83 | 6,627 |  |  | 14,789 | 16,002 |
Deferred compensation plan income (expense) |  | 1,675 | 0 |  |  | 2,778 | (2,073) |
Other income |  | 497 | 0 |  |  | 497 | 0 |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Adjusted EBITDA |  | 136,724 | 119,929 |  |  | 369,506 | 340,981 |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Stock purchase plan expense |  | 100 | 100 |  |  | 400 | 300 |
Purchase accounting adjustments to Adjusted EBITDA |  | 11,765 | 1,077 |  |  | $ 17,729 | 5,216 |
Support contracts, term |  |  |  |  |  | 1 year |  |
Innovatix |  |  |  |  |  |  |  |
Segment Reporting [Abstract] |  |  |  |  |  |  |  |
Remeasurement gain attributable to acquisition of Innovatix, LLC | $ (204,800) |  |  |  | $ (204,800) |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Ownership interest prior to acquisition (as a percent) |  |  |  |  |  |  |  | 50.00%
Ownership interest acquired (as a percent) | 50.00% |  |  |  |  |  |  |
Innovatix and Essensa |  |  |  |  |  |  |  |
Segment Reporting [Abstract] |  |  |  |  |  |  |  |
Acquisition related expenses |  | 400 |  |  |  | $ 5,100 |  |
Acquisition related adjustment - revenue |  | 11,600 |  |  |  | 17,200 |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Purchase accounting adjustments to Adjusted EBITDA |  | 11,600 |  |  |  | 17,200 |  |
Estimated purchase accounting adjustment of accounts receivable |  |  |  | $ 22,100 |  |  |  |
Estimated purchase accounting adjustment for related revenue share obligation |  |  |  | $ 4,000 |  |  |  |
Non-cash adjustments to deferred revenue of acquired entities |  | 100 | 1,100 |  |  | 500 | 5,200 |
FFF |  |  |  |  |  |  |  |
Segment Reporting [Abstract] |  |  |  |  |  |  |  |
Equity in net income of unconsolidated affiliates |  | $ (217) | 0 |  |  | $ (4,394) | 0 |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Ownership interest in FFF (as a percent) |  | 49.00% |  | 49.00% |  | 49.00% |  |
Operating Segments | Supply Chain Services |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Adjusted EBITDA |  | $ 127,898 | 118,704 |  |  | $ 364,224 | 329,642 |
Operating Segments | Performance Services |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Adjusted EBITDA |  | 36,535 | 30,771 |  |  | 87,449 | 90,158 |
Corporate |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Adjusted EBITDA |  | $ (27,709) | $ (29,546) |  |  | $ (82,167) | $ (78,819) |

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