Summary of Significant Accounting Policies (Warranty and After-Sale Costs) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accounting Policies [Abstract]
Revenue recognition period (in years)	1 year
Warranty and After-Sale Costs
Balance at beginning of year	$ 1,739	$ 882	$ 881
Net additions charged to earnings	2,837	2,512	1,069
Costs incurred and adjustments	(1,443)	(1,655)	(1,068)
Balance at end of year	$ 3,133	$ 1,739	$ 882