Acquisition of Dearmin Bancorp and The First National Bank of Odon (Estimated Fair Values Of The Assets Acquired And Liabilities Assumed) (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Sep. 30, 2018
Goodwill arising in the acquisition	$ 9,848	$ 9,848
Dearmin Bancorp and The First National Bank of Odon [Member]
Cash and due from banks	1,310
Interest-bearing deposits with banks	15,957
Interest-bearing time deposits with banks	3,817
Investment securities	39,978
Loans, net	34,467
Premises and equipment	1,125
Goodwill arising in the acquisition	1,912
Core deposit intangible	1,487
Other assets	2,890
Total assets acquired	102,943
Deposit accounts	91,765
Net deferred tax liabilities	205
Other liabilities	373
Total liabilities assumed	92,343
Total consideration	$ 10,600