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Business Developments - Additional Information (Detail) (USD $)
3 Months Ended 6 Months Ended 0 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2014
Jan. 27, 2014
Texas Industries Inc.
Jun. 30, 2014
Texas Industries Inc.
Jul. 01, 2014
Texas Industries Inc.
Subsequent Event
Schedule Of Business Development [Line Items]          
Number of shares issued per single share     0.70    
Common shares issued to former shareholders     20,300,000    
Stock price         $ 132.00
Aggregate value of common shares issued to former shareholders         $ 2,680,000,000
Business development expenses       12,781,000  
Acquisition integration expenses $ 1,942,000 $ 2,210,000   $ 2,210,000