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Equity Incentive Plan (Details) - USD ($)
$ in Millions
3 Months Ended
Feb. 23, 2020
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Issuance of Common stock       700,000
Restricted Stock [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Recognized share based compensation   $ 0.7 $ 0.7  
Unrecognized compensation   $ 10.3    
Unrecognized compensation recognition period   3 years 8 months 12 days    
Vesting period   5 years    
Fair Value Inputs Forfeiture Rate   0.00%    
Shares Outstanding, Restricted stock granted   47,000    
Intrinsic value of restricted shares   $ 1.6 1.4  
Performance Shares [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unrecognized compensation, other than options   $ 4.5    
Unrecognized compensation recognition period   4 years    
Vesting period 3 years      
Shares Outstanding, Restricted stock granted   26,000    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term 2 years 10 months 24 days      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate 18.40%      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate 2.90%      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate 1.30% 0.00%    
Share-based Compensation Arrangement by Share-based Payment Award, Amortization Expense, Term 5 years      
Performance Shares [Member] | Share-based Payment Arrangement, Tranche One [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 50.00%      
Performance Shares [Member] | Share-based Payment Arrangement, Tranche Two [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 50.00%      
Performance Shares [Member] | Maximum [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period 5 years      
Performance Units And Shares [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Recognized share based compensation   $ 0.3 $ 0.2