Goodwill and Other Intangible Assets Components of Goodwill (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 73,095	$ 73,095
Accumulated impairment	(60,501)	(42,231)
Goodwill	$ 12,594	$ 30,864	$ 67,530