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Stock-Based Compensation - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
1 Months Ended 12 Months Ended
Apr. 30, 2018
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Maximum number of shares authorized (shares)         9,700,000.0
Pre-tax stock-based compensation cost   $ 24.2 $ 22.3 $ 22.3  
Income tax benefits   5.3 5.4 8.2  
Net tax windfall as a result of exercise or vesting of awards   2.4 2.5 3.7  
Unrecognized compensation cost related to non-vested awards   33.1      
Capitalized to inventory   $ 0.2 $ 0.3 $ 0.2  
Shares issued to non-employee directors (shares)   9,376 8,480 9,128  
Minimum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Performance based criteria plan payout percentage     0.00% 0.00% 0.00%
Maximum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Performance based criteria plan payout percentage     250.00% 250.00% 250.00%
Restricted Stock Units RSU          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares vested (shares)   80,000      
Vested in period total fair value   $ 8.6 $ 6.6 $ 6.4  
Shares granted (USD per share)   $ 108.74 $ 123.39 $ 109.95  
Shares granted (shares)   134,000      
Restricted Stock Awards, Market Conditions          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award performance period   3 years      
Award vesting percentage   100.00%      
Shares vested (shares)     25,167    
Vested in period total fair value     $ 2.9    
Stock Appreciation Rights SARS          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares granted (USD per share)   $ 107.23      
Award vesting period   3 years      
Award, expiration period   10 years      
SARS exercised intrinsic value   $ 14.1 $ 10.1 $ 13.8  
Shares granted (shares)   369,000      
Performance Shares          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares granted (USD per share)   $ 98.80 $ 118.55 $ 105.48 $ 97.48
Shares outstanding (shares)   60,008 23,138 26,996 29,818
Performance Shares | Minimum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Performance based criteria plan payout percentage     0.00%    
Performance Shares | Maximum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Performance based criteria plan payout percentage     200.00%    
Performance Shares - Market Condition          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award performance period   3 years      
Shares granted (USD per share)     $ 142.89 $ 126.65  
Shares granted (shares)     24,675 29,012  
Performance Shares - Market Condition | Minimum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Performance based criteria plan payout percentage, market condition   0.00%      
Performance Shares - Market Condition | Maximum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Performance based criteria plan payout percentage, market condition   200.00%      
Performance Shares - Performance Condition          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award performance period   3 years      
Shares granted (shares)     24,675 29,012  
Performance share payout at target   100.00%      
Performance Shares - Performance Condition | Minimum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Performance based criteria plan payout percentage   0.00%      
Performance Shares - Performance Condition | Maximum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Performance based criteria plan payout percentage   250.00%      
Performance Shares - Performance Condition | December 2014 Grant          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares vested (shares) 32,425        
Vested in period total fair value $ 4.0        
Market based criteria, actual payout percentage 137.00%        
Selling and administrative          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Pre-tax stock-based compensation cost   $ 23.4 $ 21.1 $ 21.6  
Cost of goods sold          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Pre-tax stock-based compensation cost   $ 0.8 $ 1.2 $ 0.7