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Related Party Transactions - (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
May 28, 2010
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Related Party Transactions [Line Items]        
Subordinated debt interest rate 5.00%      
Debt Instrument, Unamortized Discount     $ 814  
Business acquisition transaction costs   $ 503 2,088 $ 290
Kanders & Company [Member]        
Related Party Transactions [Line Items]        
Business acquisition transaction costs     $ 1,000