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Bank segment (Details 7) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Credit risk profile by internally assigned grade for loans    
Commercial real estate $ 502,356 $ 440,443
Commercial construction 87,461 52,112
Commercial 770,079 783,388
Pass
   
Credit risk profile by internally assigned grade for loans    
Commercial real estate 444,723 375,217
Commercial construction 70,335 52,112
Commercial 715,284 703,053
Special mention
   
Credit risk profile by internally assigned grade for loans    
Commercial real estate 18,199 33,436
Commercial construction 0 0
Commercial 8,500 17,634
Substandard
   
Credit risk profile by internally assigned grade for loans    
Commercial real estate 39,434 28,020
Commercial construction 17,126  
Commercial 45,101 59,663
Doubtful
   
Credit risk profile by internally assigned grade for loans    
Commercial real estate 0 3,770
Commercial $ 1,194 $ 3,038