Segment Data - Sales and Operating Income (Loss) by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015	Jun. 30, 2015
Segment Reporting Information [Line Items]
Assets	$ 2,491,939		$ 2,491,939		$ 2,849,529
External sales:
Total sales	497,837	$ 638,970	1,577,212	$ 2,009,543
Operating income (loss):
Total operating income (loss)	27,335	(120,392)	(200,006)	(393,143)
Interest expense	7,113	7,760	20,895	23,929
Other (income) expense, net	(1,938)	(378)	(1,582)	32
Income (loss) from continuing operations before income taxes	22,160	(127,774)	(219,319)	(417,104)
Industrial [Member]
Segment Reporting Information [Line Items]
Assets	1,225,191		1,225,191		1,259,270
External sales:
Total sales	316,372	354,810	940,588	1,104,225
Operating income (loss):
Total operating income (loss)	24,692	35,311	51,802	121,123
Infrastructure [Member]
Segment Reporting Information [Line Items]
Assets	866,381		866,381		1,279,608
External sales:
Total sales	181,465	284,160	636,624	905,318
Operating income (loss):
Total operating income (loss)	3,748	(153,100)	(242,417)	(505,799)
Corporate [Member]
Segment Reporting Information [Line Items]
Assets	400,367		400,367		$ 310,651
Operating income (loss):
Total operating income (loss)	$ (1,105)	$ (2,603)	$ (9,391)	$ (8,467)