Inventories (Schedule of Inventory) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Inventory Disclosure [Abstract]
Raw materials	$ 18,367	$ 21,091
Work in process	1,147	1,283
Finished goods on hand	30,565	31,105
Finished goods on loan/consignment	38,285	36,813
Inventory total	88,364	90,292
Non-current inventories	16,400	17,465
Inventories, current	$ 71,964	$ 72,827