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Income Taxes - Reconciliation of unrecognized tax benefits (Details 6) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2015
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]      
Unrecognized tax benefits-beginning of period $ 4,946 $ 8,078 $ 7,420
Tax position changes-prior periods   188 (24)
Tax position changes-current period 1,490 472 1,945
Lapse of statute of limitations (391) (3,700) (907)
Translation 508 (92) (356)
Unrecognized tax benefits-end of period 6,553 4,946 8,078
Interest and penalties-end of period 449 308 1,326
Total liabilities related to uncertain tax positions $ 7,002 $ 5,254 $ 9,404