Divestitures - TeknaSeal Financial Data (Details) - USD ($) $ in Thousands		12 Months Ended
	Sep. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Financial data
Income from discontinued operations, net of tax		$ 4,001	$ 1,119
Precision Components Group | TeknaSeal | Discontinued Operations, Disposed of by Sale
Financial data
Sales		1,277
Cost of sales		(943)
Gross profit		334
Selling, general and administrative		(242)
Income from discontinued operations, before income taxes		92
Gain on sale of discontinued operations	$ 5,374	5,374
Total income from discontinued operations, before income taxes		5,466
Income tax expense on discontinued operations		(1,789)
Income from discontinued operations, net of tax		$ 3,677
Precision Components Group | TeknaSeal | Discontinued Operations, Held-for-sale
Financial data
Sales			4,959
Cost of sales			(2,935)
Gross profit			2,024
Selling, general and administrative			(846)
Income from discontinued operations, before income taxes			1,178
Total income from discontinued operations, before income taxes			1,178
Income tax expense on discontinued operations			(400)
Income from discontinued operations, net of tax			$ 778