Condensed Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011		Jun. 30, 2010
Condensed Consolidated Statements of Income [Abstract]
Net sales	$ 235,619	$ 168,392	$ 413,112		$ 298,802
Cost of sales	163,533	133,244	287,172		235,388
Gross profit	72,086	35,148	125,940		63,414
Selling, general and administrative expense	22,517	22,238	43,102		46,827
Provision for (recoveries of) losses on accounts receivable	79	(44)	121		(35)
Other expense	2,321	244	2,383		302
Other income	(1,105)	(100)	(1,977)		(906)
Operating income	48,274	12,810	82,311		17,226
Interest expense	1,868	1,999	3,580		4,079
Losses on extinguishment of debt	136	52	136		52
Non-operating other expense (income), net	2		(5)		(38)
Income from continuing operations before provisions for income taxes and equity in earnings and losses of affiliate	46,268	10,759	78,600		13,133
Provisions for income taxes	17,492	4,979	29,149		5,891
Equity in losses (earnings) of affiliate	78	(267)	(207)		(528)
Income from continuing operations	28,698	6,047	49,658		7,770
Net loss from discontinued operations	53	38	110		43
Net income	28,645	6,009	49,548	[1]	7,727
Dividends on preferred stocks			305		305
Net income applicable to common stock	$ 28,645	$ 6,009	$ 49,243		$ 7,422
Weighted-average common shares:
Basic	22,133	21,229	21,657		21,227
Diluted	23,526	22,377	23,485		21,692
Income per common share:
Basic	$ 1.29	$ 0.28	$ 2.27		$ 0.35
Diluted	$ 1.22	$ 0.27	$ 2.12		$ 0.35

[1] Note: For the six and three months ended June 30, 2011 and 2010, there were no differences between net income and comprehensive income.