Fair Value of Financial Instruments - Additional Information (Details) - Level 3 - Fair value on non-recurring basis - Measurement Input, Appraised Value [Member]	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)
Minimum
Fair Value, Option, Quantitative Disclosures [Line Items]
Impaired loans	5	5
Other real estate owned, net	5	5
Maximum
Fair Value, Option, Quantitative Disclosures [Line Items]
Impaired loans	15	15
Other real estate owned, net	15	15