Net Revenue and Gross Profit By Product (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Schedule Of Entity Wide Revenue And Gross Profit By Major Products [Line Items]
Net revenue from unaffiliated customers	$ 238,793,030	$ 155,570,657	$ 598,887,183	$ 459,514,280
Gross profit	25,256,402	19,456,930	64,602,428	56,012,466
Copper and CCA wire
Schedule Of Entity Wide Revenue And Gross Profit By Major Products [Line Items]
Net revenue from unaffiliated customers	101,242,664	77,187,671	291,287,470	241,612,636
Gross profit	12,791,911	12,102,105	36,137,661	36,912,420
Copper Anode
Schedule Of Entity Wide Revenue And Gross Profit By Major Products [Line Items]
Net revenue from unaffiliated customers	118,235,921	78,382,986	251,407,291	217,901,644
Gross profit	11,425,027	7,354,825	25,566,787	19,100,046
Refined Copper Rod
Schedule Of Entity Wide Revenue And Gross Profit By Major Products [Line Items]
Net revenue from unaffiliated customers	19,314,445		56,192,422
Gross profit	$ 1,039,464		$ 2,897,980