Condensed Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011	Dec. 31, 2010
Condensed Consolidated Statements Of Income [Abstract]
Net Sales	$ 311,786	$ 316,238	$ 586,302	$ 581,289
Cost of Sales	241,927	237,994	461,013	444,974
Gross Margin	69,859	78,244	125,289	136,315
Selling, General and Administrative Expenses	26,149	26,136	49,067	49,381
Operating Income	43,710	52,108	76,222	86,934
Other Income:
Other income - Continued Dumping and Subsidy Offset Act	2,701	961	2,701	961
Interest income and other - net	38	79	34	95
Income Before Income Taxes	46,449	53,148	78,957	87,990
Taxes Based on Income	16,076	18,285	27,326	30,360
Net Income	$ 30,373	$ 34,863	$ 51,631	$ 57,630
Net Income Per Common Share:
Basic and Diluted	$ 1.11	$ 1.25	$ 1.89	$ 2.06
Cash Dividends Per Common Share	$ 0.36	$ 0.33	$ 0.69	$ 0.63
Weighted Average Common Shares Outstanding:
Basic	27,206	27,758	27,248	27,886
Diluted	27,240	27,785	27,277	27,911