Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Interest Expense [Member]
Other comprehensive income (loss):
Amortization of unrealized gains and (losses)	$ 567	$ 1,034	$ 1,031
Amortization of unrealized gains and (losses)	(216)	(394)	(394)
Cost of Sales [Member]
Other comprehensive income (loss):
Amortization of unrealized gains and (losses)	112
Amortization of unrealized gains and (losses)	(42)
Net income	52,056	54,743	42,866
Actuarial gains (losses) and other changes in unrecognized costs	(26,619)	(27,344)	(604)
Amortization of unrecognized costs	4,779	4,690	4,855
Change in unrealized gains and (losses)	(1,010)	(687)	(194)
Foreign currency translation gains (losses)	(11,303)	(23,133)	6,055
Other comprehensive income (loss) before tax	(33,474)	(45,440)	11,143
Actuarial gains (losses) and other changes in unrecognized costs	10,075	10,045	362
Amortization of unrecognized costs	(1,685)	(1,671)	(1,724)
Change in unrealized gains and (losses)	384	262	74
Income tax (provision) benefit to other comprehensive income (loss)	8,516	8,242	(1,682)
Other comprehensive income (loss), net of tax	(24,958)	(37,198)	9,461
Comprehensive income (loss)	$ 27,098	$ 17,545	$ 52,327