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Borrowings - Amount of FHLB of Indianapolis/Pittsburgh Stock Purchased, Collateral Pledged and Assets Related to MICO's/Atlantic States Agreement (Parenthetical) (Detail)
Dec. 31, 2019
USD ($)
FHLB of Pittsburgh [Member] | Atlantic States [Member]  
Line of Credit Facility [Line Items]  
Collateral Pledged at carrying value $ 36,295,910