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Related Party Transactions - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Jan. 01, 2013
Dec. 31, 2016
Dec. 31, 2015
May 17, 2016
May 16, 2016
May 15, 2016
Related Party Transaction [Line Items]            
Equity Interest in acquiree, percentage       80.00%    
Management Agreement With River Banc LLC            
Related Party Transaction [Line Items]            
Renewal term 1 year          
Equity method investment, ownership interest         20.00% 20.00%
Revenue, related parties   $ 0.1 $ 0.8      
Expenses, related parties   $ 1.8 $ 8.1