Related Party Transactions (Narrative) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Related Party Transactions (Textual) [Abstract]    
Percentage of ownership for classification as affiliate 10.00%  
Total deposits $ 6,158 $ 6,871
Deposit with the bank $ 292 $ 517
Isabella Bank Foundation [Member] | Affiliated Entity [Member]
   
Related Party Transaction [Line Items]    
Shares held by related party 16,850 0