Condensed Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Condensed Consolidated Statements Of Income [Abstract]
Net Sales	$ 326,155	$ 311,786	$ 617,131	$ 586,302
Cost of Sales	244,499	241,927	469,758	461,013
Gross Margin	81,656	69,859	147,373	125,289
Selling, General and Administrative Expenses	29,031	26,149	54,176	49,067
Operating Income	52,625	43,710	93,197	76,222
Other income - Continued Dumping and Subsidy Offset Act	293	2,701	293	2,701
Interest Income and Other-Net	(39)	38	(25)	34
Income Before Income Taxes	52,879	46,449	93,465	78,957
Taxes Based on Income	17,602	16,076	31,526	27,326
Net Income	$ 35,277	$ 30,373	$ 61,939	$ 51,631
Net Income Per Common Share:
Basic	$ 1.29	$ 1.11	$ 2.26	$ 1.89
Diluted	$ 1.28	$ 1.11	$ 2.26	$ 1.89
Cash Dividends Per Common Share	$ 5.38	$ 0.36	$ 5.74	$ 0.69
Weighted Average Common Shares Outstanding:
Basic	27,243	27,206	27,236	27,248
Diluted	27,273	27,240	27,268	27,277