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Earnings Per Share - Additional Information (Detail) (USD $)
Feb. 24, 2015
May 05, 2015
Earnings Per Share Disclosure [Line Items]    
Increase in dividend rate, percentage 5.00%alb_DividendRatePercentageIncreaseDecrease  
Cash dividend, amount per share (in dollars per share) $ 0.29us-gaap_DividendsPayableAmountPerShare  
Subsequent Event    
Earnings Per Share Disclosure [Line Items]    
Cash dividend, amount per share (in dollars per share)   $ 0.29us-gaap_DividendsPayableAmountPerShare
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember