Other Borrowings - Summary of Terms of Outstanding Junior Subordinated Debentures (Parenthetical) (Detail) - Trust Preferred Securities [Member] - Junior Subordinated Debt [Member] - London Interbank Offered Rate (LIBOR) [Member]	9 Months Ended
	Sep. 30, 2018
VFSC Capital Trust I [Member]
Debt Instrument [Line Items]
LIBOR rate	3.70%
VFSC Capital Trust II [Member]
Debt Instrument [Line Items]
LIBOR rate	3.45%
VFSC Capital Trust III [Member]
Debt Instrument [Line Items]
LIBOR rate	2.80%
St Joseph Capital Trust II [Member]
Debt Instrument [Line Items]
LIBOR rate	1.75%
Anchor Capital Trust III [Member]
Debt Instrument [Line Items]
LIBOR rate	1.55%
Tower Capital Trust 2 [Member]
Debt Instrument [Line Items]
LIBOR rate	1.34%
Home Federal Statutory Trust I [Member]
Debt Instrument [Line Items]
LIBOR rate	1.65%
Monroe Bancorp Capital Trust I [Member]
Debt Instrument [Line Items]
LIBOR rate	1.60%
Monroe Bancorp Statutory Trust II [Member]
Debt Instrument [Line Items]
LIBOR rate	1.69%
Tower Capital Trust 3 [Member]
Debt Instrument [Line Items]
LIBOR rate	1.60%