Inventories, Net and Significant Suppliers - Inventories, Net (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Inventory Disclosure [Abstract]
Raw materials	$ 18,990	$ 17,438
Components	18,623	20,978
Work in process	2,017	1,050
Finished goods	59,393	46,939
Reserve for excess and obsolete inventory	(2,714)	(2,024)	(3,447)	(2,135)
Inventories, net	$ 96,309	$ 84,381