Goodwill and Other Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Sep. 30, 2012
Goodwill [Roll Forward]
Goodwill	$ 114,396
Accumulated impairment loss	(57,656)
Balance at beginning of period	56,740
Foreign exchange rate changes	108
Goodwill	114,504
Accumulated impairment loss	(57,656)
Balance at end of period	56,848
GMI [Member]
Goodwill [Roll Forward]
Goodwill	34,591
Accumulated impairment loss	0
Balance at beginning of period	34,591
Foreign exchange rate changes	128
Goodwill	34,719
Accumulated impairment loss	0
Balance at end of period	34,719
Globe Metales [Member]
Goodwill [Roll Forward]
Goodwill	14,313
Accumulated impairment loss	0
Balance at beginning of period	14,313
Foreign exchange rate changes	0
Goodwill	14,313
Accumulated impairment loss	0
Balance at end of period	14,313
Solsil [Member]
Goodwill [Roll Forward]
Goodwill	57,656
Accumulated impairment loss	(57,656)
Balance at beginning of period	0
Foreign exchange rate changes	0
Goodwill	57,656
Accumulated impairment loss	(57,656)
Balance at end of period	0
Other [Member]
Goodwill [Roll Forward]
Goodwill	7,836
Accumulated impairment loss	0
Balance at beginning of period	7,836
Foreign exchange rate changes	(20)
Goodwill	7,816
Accumulated impairment loss	0
Balance at end of period	$ 7,816