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Stockholders' Equity - Additional Information (Detail) - USD ($)
 12 Months Ended
Feb. 24, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Jun. 30, 2015
Nov. 30, 2014
Apr. 30, 2014
Class of Stock [Line Items]              
Accumulated Other Comprehensive Income (Loss), Net of Tax   $ (92,000,000) $ (88,800,000) $ (79,500,000)      
Common stock, shares authorized   90,000,000 90,000,000        
Common stock, par value (usd per share)   $ 1 $ 1        
Common stock, shares issued   65,400,000 64,800,000        
Common stock, shares outstanding   59,600,000 62,200,000        
Preference stock, shares authorized   800,000          
Preference stock, par value (usd per share)   $ 1          
Cash dividends declared per common share (usd per share)   $ 0.28 $ 0.25 $ 0.09      
Authorized amount         $ 15,000,000   $ 15,000,000
Shares acquired     724,792 696,263      
Stock repurchase program, amount acquired   $ 37,800,000 $ 10,600,000 $ 10,300,000      
Cash dividends paid to stockholders   16,900,000 15,600,000 5,600,000      
Subsequent Event [Member]              
Class of Stock [Line Items]              
Cash dividends declared per common share (usd per share) $ 0.07            
Foreign Currency Translation [Member]              
Class of Stock [Line Items]              
Accumulated Other Comprehensive Income (Loss), Net of Tax   (13,000,000) $ (13,300,000) $ 200,000      
Fire Rescue [Member] | Foreign Currency Translation [Member]              
Class of Stock [Line Items]              
Accumulated Other Comprehensive Income (Loss), Net of Tax   $ (7,400,000)          
November 2014 Repurchase Program [Member]              
Class of Stock [Line Items]              
Authorized amount           $ 75,000,000  
Shares acquired   2,961,007          
Stock repurchase program, amount acquired   $ 37,800,000