Intangible assets Expected Amortization (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Goodwill and Intangible Assets Disclosure [Abstract]    
2014 $ 556  
2015 521  
2016 372  
2017 358  
2018 323  
Thereafter 1,992  
Total, net $ 4,122 $ 4,195