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Goodwill (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Goodwill [Line Items]      
Goodwill impairment $ 0 $ 0 $ 265,423
APP [Member]      
Goodwill [Line Items]      
Goodwill impairment   $ 265,400