Inventories (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Components of Inventory
Raw materials	$ 18,341	$ 12,883
Work-in-process	1,779	342
Finished goods	54,229	34,704
Inventories	74,349	47,929
Less reserve for excess and obsolete inventory	(3,492)	(2,752)
Inventories, net	$ 70,857	$ 45,177