Quarterly report pursuant to Section 13 or 15(d)

Related Party Transactions - (Narrative) (Details)

v3.8.0.1
Related Party Transactions - (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Aug. 21, 2017
May 28, 2010
Sep. 30, 2017
Sep. 30, 2017
Sep. 30, 2016
Mar. 31, 2017
Dec. 31, 2016
Jun. 24, 2013
May 29, 2012
Related Party Transactions [Line Items]                  
Subordinated Debt             $ 22,610    
5% Unsecured Subordinated Notes             22,610    
Subordinated debt interest rate   5.00%              
Debt Instrument, Unamortized Discount           $ 814 $ 814    
Transaction costs     $ 1,869 $ 1,869 $ 269        
Subordinated Debt [Member]                  
Related Party Transactions [Line Items]                  
Subordinated debt effective interest rate   14.00%              
Kanders & Company [Member]                  
Related Party Transactions [Line Items]                  
Transaction costs $ 1,000                
Kanders GMP Holdings, LLC [Member]                  
Related Party Transactions [Line Items]                  
Subordinated Debt   $ 14,517             $ 365
Interest paid on transferred subordinated note     0 89          
Interest paid on Gregory employees subordinated notes     0 2          
5% Unsecured Subordinated Notes   14,517             365
Discounted subordinated notes   8,640              
Schiller Gregory Investment Company, LLC [Member]                  
Related Party Transactions [Line Items]                  
Subordinated Debt   7,539             189
Interest paid on Gregory employees subordinated notes     0 1          
5% Unsecured Subordinated Notes   7,539             $ 189
Discounted subordinated notes   4,487              
Former Employees [Member]                  
Related Party Transactions [Line Items]                  
Subordinated Debt   554              
5% Unsecured Subordinated Notes   554              
Discounted subordinated notes   $ 316              
Robert R. Schiller 2013 Cornerstone Trust and the Deborah Schiller 2005 Revocable Trust [Member]                  
Related Party Transactions [Line Items]                  
Interest paid on transferred subordinated note     $ 0 $ 46          
Robert R. Schiller 2013 Cornerstone Trust [Member]                  
Related Party Transactions [Line Items]                  
Subordinated Debt               $ 3,769  
5% Unsecured Subordinated Notes               $ 3,769