Net Revenue and Gross Profit By Product (Detail) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Schedule Of Entity Wide Revenue And Gross Profit By Major Products [Line Items]
Net revenue from unaffiliated customers	$ 218,229,539	$ 169,086,267
Gross profit	21,055,352	18,634,992
Copper and CCA wire
Schedule Of Entity Wide Revenue And Gross Profit By Major Products [Line Items]
Net revenue from unaffiliated customers	87,001,955	89,647,446
Gross profit	10,076,845	10,843,324
Copper anode
Schedule Of Entity Wide Revenue And Gross Profit By Major Products [Line Items]
Net revenue from unaffiliated customers	113,964,856	62,968,553
Gross profit	10,207,411	7,024,954
Refined copper rod
Schedule Of Entity Wide Revenue And Gross Profit By Major Products [Line Items]
Net revenue from unaffiliated customers	17,262,728	16,470,268
Gross profit	$ 771,096	$ 766,714