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Basis of Accounting and Consolidation 3 (AOCI) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2017
Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]    
Total accumulated other comprehensive income, net of tax $ 2,649 $ (5,761)
Accumulated Other Comprehensive Income (Loss) [Member]    
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]    
Net unrealized gains on securities available-for-sale 5,229 (7,649)
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss 338 394
Other than Temporary Impairment Loss, Investments, Portion in Other Comprehensive Loss, before Tax, Portion Attributable to Parent, Available-for-sale Securities (550) (1,398)
Unrealized gain (loss) on available-for-sale securities, tax benefit (1,906) 3,135
Total unrealized gain (loss) on available for sale securities, net of tax 2,985 (4,908)
Securities with other-than-temporary impairment losses, tax benefit 214 545
Total securities with other-than-temporary impairment losses, net of tax (336) (853)
Accumulated other comprehensive income, tax (1,692) 3,680
Total accumulated other comprehensive income, net of tax $ 2,649 $ (5,761)