Segment Information (Details 2) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Subcategory revenues
Sales	$ 192,194	$ 162,957	$ 541,943	$ 440,345
Growth Products [Member]
Subcategory revenues
Sales	151,758	93,193	389,438	251,998
Growth Products [Member] | Broadband Access [Member]
Subcategory revenues
Sales	86,954	45,099	215,798	126,432
Growth Products [Member] | Optical Access [Member]
Subcategory revenues
Sales	22,298	18,619	65,222	46,006
Growth Products [Member] | Internetworking [Member]
Subcategory revenues
Sales	42,506	29,475	108,418	79,560
Traditional Products [Member]
Subcategory revenues
Sales	40,436	69,764	152,505	188,347
Traditional Products [Member] | HDSL [Member]
Subcategory revenues
Sales	25,297	49,383	100,291	131,487
Traditional Products [Member] | Other products [Member]
Subcategory revenues
Sales	$ 15,139	$ 20,381	$ 52,214	$ 56,860