Inventories (Changes in Inventory Reserve) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Change in the reserve for excess and obsolete inventory
Write-down for inventory	$ 18,600	$ 2,000
Inventory Valuation Reserve [Member]
Change in the reserve for excess and obsolete inventory
Balance, beginning of year	0	2,744	$ 2,752
Charged to costs and expenses	0	358	1,330
Deductions	0	(3,102)	(1,338)
Balance, end of the year	$ 0	$ 0	$ 2,744