Purchased Intangible Assets and Goodwill (Composition of Purchased Intangibles) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Indefinite life intangible assets	$ 11,949	$ 12,148
Definite life intangible assets, net of accumulated amortization of $16,758 and $15,975	4,415	5,623
Total	16,364	17,771	$ 19,325
Definite life intangible assets, accumulated amortization	$ 16,758	$ 15,975