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Employee Benefits - Stock Appreciation Rights Plan (Details) - USD ($)
$ in Thousands
12 Months Ended
May. 18, 2007
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Jul. 14, 2014
Stock Appreciation Rights Plan          
Share-based Compensation   $ 707 $ 964 $ 335  
Total stock-based compensation expense   707 $ 204 $ 335  
Restricted Stock          
Stock Appreciation Rights Plan          
Share-based Compensation   $ 800      
SAR Plan          
Stock Appreciation Rights Plan          
Number of units authorized for issuance 200,000        
Term of awards 10 years        
Units outstanding   103,000 134,000    
Total stock-based compensation expense   $ 218 $ 416    
2014 Plan          
Stock Appreciation Rights Plan          
Number of units authorized for issuance         1,273,838
2014 Plan | Restricted Stock          
Stock Appreciation Rights Plan          
Units Issued   275,000      
Units outstanding   292,500 275,000