Inventories (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Components of Inventory
Raw materials	$ 28,816	$ 13,953
Work-in-process	2,576	1,904
Finished goods	43,214	50,019
Inventories	74,606	65,876
Less reserve for excess and obsolete inventory	(2,597)	(2,744)
Inventories, net	$ 72,009	$ 63,132