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Disclosures about Fair Value of Assets and Liabilities (Details Textual)	12 Months Ended
	Dec. 31, 2018
Disclosures About Fair Value of Assets and Liabilities (Textual)
Interest rate on mortgage service, description	The mortgage servicing rights have increased in value. The servicing rights have had a decline in prepayments and the 0.49 percent decrease in the constant prepayment rate reflects the change in market rates.

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Interest rate on mortgage service description.

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