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Shareholders' Equity - Additional Information (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 6 Months Ended 1 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Apr. 24, 2013
Apr. 30, 2013
Subsequent Event
Class of Stock [Line Items]            
Preferred stock dividends (in dollars per share)     $ 300      
Preferred stock dividend rate     6.00%      
Stock Issued during period, Fair Value per Share, Acquisitions         $ 4.23  
Common stock dividends (in dollars per share)     $ 0.1125      
Other Comprehensive loss, pension and postretirements obligations, before tax     $ 58 $ 72    
Change in pension and postretirement obligations, net of tax $ 10 $ 13 $ 20 $ 26    
Net proceeds used to repurchase shares before effectiveness (up to 50%)           25.00%
Buyback obligation termination (less than 5%)           5.00%
Standstill agreement termination (less than 10%)           10.00%