Effective Tax Rate Reconciliation (Details)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Effective Tax Rate Continuing Operations Tax Rate Reconciliation [Abstract]
Federal income tax rate	35.00%	35.00%	35.00%
State income tax rate, net of federal benefit	(2.70%)	0.30%	(0.30%)
Foreign income tax rate differential	(25.00%)	(30.30%)	(22.20%)
Permanent items	4.60%	3.20%	12.50%
Permanent portion of equity compensation	0.50%	0.40%	1.60%
Charitable donations of inventory	(0.10%)		(0.10%)
Change in valuation allowance	(8.40%)	3.60%	(34.20%)
Unremitted foreign earnings of subsidiary	2.00%		21.70%
Uncertain tax positions	3.50%	8.70%	1.40%
Other	0.40%	(3.40%)	0.80%
Effective income tax rate	9.80%	17.50%	16.20%