Borrowings Borrowings Subordinated Borrowings (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Debt Instrument [Line Items]    
Subordinated debt $ 46,393 $ 46,393
Floating rate 30-year capital securities with interest adjusted and paid quarterly at three-month LIBOR plus 3.10%, with a rate at December 31, 2014 and 2013, of 3.35%    
Debt Instrument [Line Items]    
Subordinated debt 15,464 15,464
Debt maturity period (in years) 30 years  
Description of Variable Rate Basis three-month LIBOR  
Basis Spread on Variable Rate 3.10%  
Variable Rate 3.35% 3.35%
Floating rate 30-year capital securities with interest adjusted and paid quarterly at three-month LIBOR plus 1.89%, with a rate at December 31, 2014 and 2013, of 2.13%    
Debt Instrument [Line Items]    
Subordinated debt 10,310 10,310
Debt maturity period (in years) 30 years  
Description of Variable Rate Basis three-month LIBOR  
Basis Spread on Variable Rate 1.89%  
Variable Rate 2.13% 2.13%
Floating rate 30-year capital securities with interest adjusted and paid quarterly at three-month LIBOR plus 1.40%, with rate at December 31, 2014 and 2013 of 1.64%    
Debt Instrument [Line Items]    
Subordinated debt $ 20,619 $ 20,619
Debt maturity period (in years) 30 years  
Description of Variable Rate Basis three-month LIBOR  
Basis Spread on Variable Rate 1.40%  
Variable Rate 1.64% 1.64%