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DEBT - Additional Information (Details) - USD ($) |  | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Mar. 03, 2015 | Jun. 30, 2017 | Apr. 14, 2017 | Jun. 30, 2016 | Sep. 02, 2015 | May 05, 2014
Debt Disclosure [Line Items] |  |  |  |  |  |
Short-term debt |  | $ 14,743,000 |  | $ 10,993,000 |  |
Long-term debt |  | 241,821,000 |  | $ 191,564,000 |  |
Sublimit for letters of credit |  |  |  |  |  |
Debt Disclosure [Line Items] |  |  |  |  |  |
Revolving credit facility |  |  |  |  | $ 237,000 |
Original Credit Agreement | Revolving credit facility |  |  |  |  |  |
Debt Disclosure [Line Items] |  |  |  |  |  |
Revolving credit facility |  |  |  |  |  | $ 150,000,000.0
Original Credit Agreement | Sublimit for letters of credit |  |  |  |  |  |
Debt Disclosure [Line Items] |  |  |  |  |  |
Revolving credit facility |  |  |  |  |  | 10,000,000.0
Original Credit Agreement | Sublimit for swingline loan advances |  |  |  |  |  |
Debt Disclosure [Line Items] |  |  |  |  |  |
Revolving credit facility |  |  |  |  |  | $ 25,000,000.0
Amended Credit Agreement | Revolving credit facility |  |  |  |  |  |
Debt Disclosure [Line Items] |  |  |  |  |  |
Revolving credit facility | $ 200,000,000.0 |  |  |  |  |
Life of credit facility, increase (decrease) |  | (99,000,000) |  |  |  |
Line of credit facility, fair value of amount outstanding |  | 181,000,000 |  |  |  |
Line of credit facility, remaining borrowing capacity |  | 119,000,000 |  |  |  |
Issuance fees per annum | 0.125% |  |  |  |  |
Maximum leverage ratio | 2.50 |  |  |  |  |
Minimum liquidity to satisfy covenant terms | $ 250,000,000.0 |  |  |  |  |
Availability of revolving credit facility to satisfy covenant term | $ 50,000,000.0 |  |  |  |  |
Aggregate payments |  | 37,200,000 |  |  |  |
Debt instrument, periodic payment, principal |  | 34,000,000 |  |  |  |
Debt instrument, periodic payment, interest |  | 3,200,000 |  |  |  |
Amended Credit Agreement | Revolving credit facility | Minimum |  |  |  |  |  |
Debt Disclosure [Line Items] |  |  |  |  |  |
Commitment fee percentage of unused borrowings | 0.20% |  |  |  |  |
Amended Credit Agreement | Revolving credit facility | Maximum |  |  |  |  |  |
Debt Disclosure [Line Items] |  |  |  |  |  |
Commitment fee percentage of unused borrowings | 0.35% |  |  |  |  |
Amended Credit Agreement | Sublimit for letters of credit | Minimum |  |  |  |  |  |
Debt Disclosure [Line Items] |  |  |  |  |  |
Commitment fee percentage of unused borrowings | 1.50% |  |  |  |  |
Amended Credit Agreement | Sublimit for letters of credit | Maximum |  |  |  |  |  |
Debt Disclosure [Line Items] |  |  |  |  |  |
Commitment fee percentage of unused borrowings | 2.25% |  |  |  |  |
Amended Credit Agreement | Term loan facility |  |  |  |  |  |
Debt Disclosure [Line Items] |  |  |  |  |  |
Revolving credit facility |  |  | $ 100,000,000.0 |  |  |
Repayments of outstanding balance |  | 72,300,000 |  |  |  |
Line of credit facility, fair value of amount outstanding |  | $ 76,300,000 |  |  |  |
Line of credit facility, interest rate at period end |  | 2.65% |  |  |  |
Aggregate payments |  | $ 13,300,000 |  |  |  |
Debt instrument, periodic payment, principal |  | 11,300,000 |  |  |  |
Debt instrument, periodic payment, interest |  | $ 2,000,000 |  |  |  |
Amended Credit Agreement | Base rate | Revolving credit facility | Minimum |  |  |  |  |  |
Debt Disclosure [Line Items] |  |  |  |  |  |
Debt basis spread on variable rate | 0.50% |  |  |  |  |
Amended Credit Agreement | Base rate | Revolving credit facility | Maximum |  |  |  |  |  |
Debt Disclosure [Line Items] |  |  |  |  |  |
Debt basis spread on variable rate | 1.25% |  |  |  |  |
Amended Credit Agreement | Base rate | Sublimit for swingline loan advances | Minimum |  |  |  |  |  |
Debt Disclosure [Line Items] |  |  |  |  |  |
Debt basis spread on variable rate | 0.50% |  |  |  |  |
Amended Credit Agreement | Base rate | Sublimit for swingline loan advances | Maximum |  |  |  |  |  |
Debt Disclosure [Line Items] |  |  |  |  |  |
Debt basis spread on variable rate | 1.25% |  |  |  |  |
Amended Credit Agreement | Federal funds rate | Revolving credit facility |  |  |  |  |  |
Debt Disclosure [Line Items] |  |  |  |  |  |
Debt basis spread on variable rate | 0.50% |  |  |  |  |
Amended Credit Agreement | LIBOR | Revolving credit facility |  |  |  |  |  |
Debt Disclosure [Line Items] |  |  |  |  |  |
Debt basis spread on variable rate | 1.00% |  |  |  |  |
Amended Credit Agreement | LIBOR | Revolving credit facility | Minimum |  |  |  |  |  |
Debt Disclosure [Line Items] |  |  |  |  |  |
Debt basis spread on variable rate | 1.50% |  |  |  |  |
Amended Credit Agreement | LIBOR | Revolving credit facility | Maximum |  |  |  |  |  |
Debt Disclosure [Line Items] |  |  |  |  |  |
Debt basis spread on variable rate | 2.25% |  |  |  |  |
Amended Credit Agreement | Applicable interest rate | Revolving credit facility |  |  |  |  |  |
Debt Disclosure [Line Items] |  |  |  |  |  |
Debt basis spread over applicable interest rate | 2.00% |  |  |  |  |
Amended Credit Agreement, First Amendment [Member] | Revolving credit facility |  |  |  |  |  |
Debt Disclosure [Line Items] |  |  |  |  |  |
Revolving credit facility |  |  | 300,000,000.0 |  |  |
Additional borrowing capacity |  |  | $ 50,000,000.0 |  |  |
Quarterly Installments through March 31, 2017 | Amended Credit Agreement | Term loan facility |  |  |  |  |  |
Debt Disclosure [Line Items] |  |  |  |  |  |
Percentage of principal due quarterly | 2.50% |  |  |  |  |
Quarterly Installments after March 31, 2017 through maturity | Amended Credit Agreement | Term loan facility |  |  |  |  |  |
Debt Disclosure [Line Items] |  |  |  |  |  |
Percentage of principal due quarterly | 3.75% |  |  |  |  |

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