Consolidated Statements Of Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Consolidated Statements Of Comprehensive Income [Abstract]
Net sales	$ 420,188	$ 472,490	$ 431,021
Cost of sales	340,836	377,627	337,262
Gross profit	79,352	94,863	93,759
Selling and general expenses	21,898	35,144	20,022
Change in contingent consideration liability	(3,000)
Goodwill impairment	2,840	0	0
Operating profit	57,614	59,719	73,737
Other income	731	705	1,288
Earnings before provision for income taxes	58,345	60,424	75,025
Income tax provision	17,093	21,549	27,057
Net earnings	41,252	38,875	47,968
Weighted average common shares outstanding:
Basic and diluted	6,907	6,889	6,875
Net earnings per share:
Basic and diluted	$ 5.97	$ 5.64	$ 6.98
Other comprehensive loss, net of tax:
Unrealized loss on available-for-sale securities	45	19	57
Comprehensive income	$ 41,207	$ 38,856	$ 47,911