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Investment Securities (Detail Textuals)
$ in Thousands
Jun. 30, 2018
USD ($)
Security
Dec. 31, 2017
USD ($)
Security
Investments Debt And Equity Securities [Abstract]    
Available for sale securities reported at cost in other assets $ 9,300 $ 11,000
Available for sale securities, pledged $ 187,300 $ 181,700
Number of securities consisted in portfolio | Security 369 355
Number of securities in loss position | Security 322 280
Aggregate fair value of securities in loss position $ 212,002 $ 207,929
Loss position for 12 months or longer 114,099 114,649
Aggregate unrealized loss included in accumulated other comprehensive income (loss) $ 5,972 $ 3,322