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Property and Equipment (PPE Schedule) (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Property, Plant and Equipment [Abstract]    
Building and improvements $ 177,253 $ 170,420
Movable equipment 237,312 215,444
Construction in progress 8,676 11,940
Property and equipment, gross 423,241 397,804
Less accumulated depreciation (234,073) (217,356)
Property and equipment, net $ 189,168 $ 180,448