Income Taxes (Summary of Valuation Allowance) (Details) (Deferred Tax Valuation Allowance, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Deferred Tax Valuation Allowance
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance as of	$ 306	$ 2,574	$ 2,613
Cost charged to the tax provision	144	0	266
Reductions	(50)	(2,268)	(305)
Balance as of	$ 400	$ 306	$ 2,574