Income Taxes (Summary of Valuation Allowance) (Details) - Deferred Tax Valuation Allowance - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance as of	$ 400	$ 306	$ 2,574
Cost charged to the tax provision	286	144	0
Valuation Allowances and Reserves, Adjustments	158	0	0
Reductions	(78)	(50)	(2,268)
Balance as of	$ 766	$ 400	$ 306