Stockholders' Equity (Share Buyback Program) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2016	Nov. 10, 2015	Nov. 06, 2014
Equity, Class of Treasury Stock [Line Items]
Treasury Stock, Value, Acquired, Cost Method		$ 8,190
November 2014 Share Repurchase Plan
Equity, Class of Treasury Stock [Line Items]
Stock buyback program, authorized amount			$ 10,000	$ 10,000
Treasury Stock, Shares, Acquired (in Shares)	265,900	664,500
Treasury Stock, Value, Acquired, Cost Method	$ 3,500	$ 8,200