Inventories, Net and Significant Suppliers - Related Party Vendor (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Related Party Transaction [Line Items]
Document Period End Date			Jun. 30, 2013
Related Party Vendor [Member]
Related Party Transaction [Line Items]
Ownership Percentage in Third Party by Executive			40.00%
Inventory Purchases	$ 2,469	$ 2,152	$ 4,685	$ 3,507
% of Total Inventory Purchases	3.00%	3.80%	3.20%	3.30%
Accounts Payable	$ 1,476		$ 1,476		$ 1,815
% of Accounts Payable	2.20%		2.20%		3.00%