Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net sales	$ 759,031	$ 805,256	$ 609,905
Cost of sales	575,295	582,238	471,280
Gross profit	183,736	223,018	138,625
Selling, general and administrative expense	89,988	86,343	89,720
Provisions for (recovery of) losses on accounts receivable	(214)	347	145
Other expense	2,118	3,823	1,262
Other income	(3,811)	(3,938)	(8,427)
Operating income	95,655	136,443	55,925
Interest expense	4,237	6,658	7,427
Losses on extinguishment of debt		136	52
Non-operating other income, net	(281)		(53)
Income from continuing operations before provisions for income taxes and equity in earnings of affiliate	91,699	129,649	48,499
Provisions for income taxes	33,594	46,208	19,787
Equity in earnings of affiliate	(681)	(543)	(1,003)
Income from continuing operations	58,786	83,984	29,715
Net loss from discontinued operations	182	142	141
Net income	58,604	83,842	29,574
Dividends on preferred stocks	300	305	305
Net income applicable to common stock	$ 58,304	$ 83,537	$ 29,269
Basic:
Income from continuing operations	$ 2.62	$ 3.81	$ 1.39
Net loss from discontinued operations	$ (0.01)	$ (0.01)	$ (0.01)
Net income	$ 2.61	$ 3.80	$ 1.38
Diluted:
Income from continuing operations	$ 2.50	$ 3.59	$ 1.33
Net loss from discontinued operations	$ (0.01)	$ (0.01)	$ (0.01)
Net income	$ 2.49	$ 3.58	$ 1.32