Borrowings - Amount of FHLB of Indianapolis/Pittsburgh Stock Purchased, Collateral Pledged and Assets Related to MICO's/Atlantic States Agreement (Parenthetical) (Detail) (Lines of Credit [Member], USD $)	Jun. 30, 2013
Indianapolis [Member] | MICO [Member]
Line of Credit Facility [Line Items]
Collateral Pledged at carrying value	$ 2,936,074
Pittsburgh [Member] | Atlantic States [Member]
Line of Credit Facility [Line Items]
Collateral Pledged at carrying value	$ 15,878,619