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Troubled Debt Restructurings (Tables)
 6 Months Ended
Jun. 30, 2017
Troubled Debt Restructurings [Abstract]  
Summary of concession at the time of modification and the recorded investment in TDRs before and after their modification
 
For the six months ended June 30, 2017
Pre- Post-
modification modification
Renewals Reduced Converted Maturity Total outstanding outstanding
deemed a or deferred to interest date Number recorded recorded
(dollars in thousands)       concession       payments       only       extensions       of loans       investment       investment
Commercial
Business 1 1 - - 2 $      378 $      387
Total loans 1 1 - - 2 $ 378 $ 387
 
For the three and six months ended June 30, 2016
Pre- Post-
modification modification
Renewals Reduced Converted Maturity Total outstanding outstanding
deemed a or deferred to interest date Number recorded recorded
(dollars in thousands) concession payments only extensions of loans investment investment
Commercial
Business 1 - - - 1 $ 2,381 $ 2,381
Consumer
Other 2 - - - 2 110 114
Total loans 3 - - - 3 $ 2,491 $ 2,495