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Fair Value Measurements (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Jun. 30, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short-term investments	$ 27,000
Level 1 | Fair values
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short-term investments	27,000	$ 0
Derivatives asset	0	0
Interest rate swap	0	0
Contingent consideration on acquisitions	0	0
Level 2 | Fair values
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short-term investments	0	0
Derivatives asset	0	2,686
Interest rate swap	1,788	0
Contingent consideration on acquisitions	0	0
Level 3 | Fair values
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Short-term investments	0	0
Derivatives asset	0	0
Interest rate swap	0	0
Contingent consideration on acquisitions	$ (8,079)	$ (7,644)

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