Note 19. Accumulated Other Comprehensive Income (Loss) - Reclassification from Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Cost of Sales										$ (1,116,709)	$ (1,093,438)	$ (986,031)
Selling and Administrative Expenses										(43,920)	(46,653)	(43,992)
Benefit (Provision) for Income Taxes										(6,961)	(6,927)	(28,023)
Net Income (Loss)		$ (1,273)	$ 6,259	$ 6,612	$ 6,598	$ 7,525	$ 11,849	$ 7,115	$ 5,069	18,196	31,558	$ 16,752
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Net Income (Loss)										394	1,215
Reclassification out of Accumulated Other Comprehensive Income | Derivative Gain (Loss) | Foreign Exchange Contract
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Cost of Sales	[1]									64	1,061
Nonoperating Income (Expense)	[1]									0	5
Benefit (Provision) for Income Taxes	[1]									22	(209)
Net Income (Loss)	[1]									86	857
Reclassification out of Accumulated Other Comprehensive Income | Postemployment Benefits, Amortization of actuarial gain (loss)
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Nonoperating Income (Expense)	[2]									406	472
Benefit (Provision) for Income Taxes	[2]									(98)	(114)
Net Income (Loss)	[2]									$ 308	$ 358

[1] See Note 14 - Derivative Instruments of Notes to Consolidated Financial Statements for further information on derivative instruments.

[2] See Note 9 - Employee Benefit Plans of Notes to Consolidated Financial Statements for further information on postemployment benefit plans.