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Business Combinations (Narrative) (Details) (AATI [Member], USD $)
Sep. 28, 2012
Jan. 09, 2012
AATI [Member]
   
Business Acquisition [Line Items]    
Percentage of interest acquired   100.00%
Aggregated purchase price   $ 277,344,000
Goodwill   133,958,000
Business Acquisition, Cost of Acquired Entity, Transaction Costs $ 10,900,000