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Securities (Tables)
3 Months Ended
Mar. 31, 2019
Investments debt and equity securities [Abstract]  
Available-for-sale Securities [Table Text Block]
1 year1 to 55 to 10After 10FairGross Unrealized Amortized
(Dollars in thousands)or lessyearsyearsyearsValueGainsLossesCost
March 31, 2019
Agency obligations (a)$14,46821,86214,64550,97521763$51,717
Agency RMBS (a)11,222109,782121,0041622,143122,985
State and political subdivisions1,5946,76860,94669,3081,11822668,416
Total available-for-sale$14,46823,45632,635170,728241,2871,3013,132$243,118

December 31, 2018
Agency obligations (a)$14,43719,86516,86951,171251,200$52,346
Agency RMBS (a)8,368110,230118,598653,738122,271
State and political subdivisions3,6827,72658,62470,03251869270,206
Total available-for-sale$14,43723,54732,963168,854239,8016085,630$244,823
(a) Includes securities issued by U.S. government agencies or government-sponsored entities.
Available-for-sale Securities, Continuous Unrealized Loss Position [Table Text Block]
Less than 12 Months12 Months or LongerTotal
FairUnrealizedFairUnrealizedFairUnrealized
(Dollars in thousands)ValueLossesValueLossesValueLosses
March 31, 2019:
Agency obligations $49,159763$49,159763
Agency RMBS107,5032,143107,5032,143
State and political subdivisions13,27322613,273226
Total $169,9353,132$169,9353,132

December 31, 2018:
Agency obligations $4,7242844,3071,172$49,0311,200
Agency RMBS12,32523899,1843,500111,5093,738
State and political subdivisions14,84018114,38451129,224692
Total $31,889447157,8755,183$189,7645,630
Schedule of Realized Gain (Loss) [Table Text Block]
Realized Gains and Losses
The following table presents the gross realized gains and losses on sales of securities.
Quarter ended March 31,
(Dollars in thousands)20192018
Gross realized gains$5$
Realized gains, net$5$