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Business Combinations (Narrative) (Details) (AATI [Member], USD $)
Jun. 29, 2012
Jan. 09, 2012
AATI [Member]
   
Business Acquisition [Line Items]    
Business Acquisition, Percentage of Voting Interests Acquired   100.00%
Business Combination, Consideration Transferred   $ 277,344,000
Acquired Goodwill   138,742,000
Business Acquisition, Cost of Acquired Entity, Transaction Costs $ 9,800,000