Inventories, Net And Significant Suppliers - Purchases from Significant Suppliers (Details) (Cost of Goods, Total [Member], Supplier Concentration Risk [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Victory Chemical [Member]
Concentration Risk [Line Items]
Inventory Purchases	$ 8,230		$ 0	[1]
Concentration risk	11.20%		0.00%	[1]
Maxim [Member]
Concentration Risk [Line Items]
Inventory Purchases	$ 0	[1]	$ 8,054
Concentration risk	0.00%	[1]	13.00%

[1] Purchases from this supplier did not total more than 10% of our total inventory purchases in this period.