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Share-Based Compensation and Employee Ownership Plans SARs (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Shares Subject to Option      
Balance outstanding, beginning of period, shares 191,962    
Balance outstanding, end of period, shares   191,962  
Weighted Average Exercise Price/Share      
Closing stock price, in dollars per share $ 13.34 $ 13.65  
Stock Appreciation Rights      
Weighted Average Exercise Price/Share      
Exercisable, weighted remaining contractual term 0 years 0  
Equity Plans      
Weighted Average Exercise Price/Share      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value $ 0 $ 0  
Equity Plans | Stock Appreciation Rights      
Shares Subject to Option      
Balance outstanding, beginning of period, shares 75,000 100,000  
Acquired, shares (75,000) (25,000)  
Balance outstanding, end of period, shares 0 75,000 100,000
Balance exercisable, shares 0 0  
Weighted Average Exercise Price/Share      
Balance outstanding, beginning of period, in dollars per share $ 11.60 $ 11.60  
Acquired, in dollars per share 14.21 11.60  
Balance outstanding, end of period, in dollars per share   11.60 $ 11.60
Balance exercisable, weighted shares $ 0.00 $ 0  
Weighted Average Remaining Term Outstanding 0 years 2 months 16 days 1 year 2 months 16 days
Aggregate intrinsic value, outstanding [1] $ 0 $ 173  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value [1]     $ 435
Granted, shares   0  
Granted, in dollars per share   $ 0.00  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period   0  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value   $ 0.00  
[1] Based on the Company's closing stock price of $13.34 on December 31, 2018 and $13.65 on December 31, 2017.