Condensed Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Condensed Consolidated Statements Of Income [Abstract]
Net Sales	$ 279,511	$ 271,098	$ 896,642	$ 857,400
Cost of Sales	220,687	217,296	690,445	678,309
Gross Margin	58,824	53,802	206,197	179,091
Selling, General and Administrative Expenses	26,517	25,848	80,693	74,915
Operating Income	32,307	27,954	125,504	104,176
Other income - Continued Dumping and Subsidy Offset Act	0	0	293	2,701
Interest Income and Other-Net	(63)	39	(88)	73
Income Before Income Taxes	32,244	27,993	125,709	106,950
Taxes Based on Income	10,411	9,771	41,937	37,097
Net Income	$ 21,833	$ 18,222	$ 83,772	$ 69,853
Net Income Per Common Share:
Basic and Diluted	$ 0.80	$ 0.67	$ 3.06	$ 2.56
Cash Dividends Per Common Share	$ 0.38	$ 0.36	$ 6.12	$ 1.05
Weighted Average Common Shares Outstanding:
Basic	27,259	27,216	27,244	27,237
Diluted	27,287	27,251	27,275	27,268