Investment Securities-Classified by Contractual Maturity Date (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Mar. 31, 2018
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost	$ 1,005
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost	8,279
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost	17,775
Debt Securities, Available-for-sale, Allocated and Single Maturity Date, Maturity, after 10 Years, Amortized Cost	53,725
Debt Securities, Available-for-sale, Amortized Cost	80,784
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value	998
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value	8,116
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value	17,590
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value	53,141
Debt Securities, Available-for-sale	$ 79,845
Debt Securities, Available-for-sale, Maturity, Weighted Average Yield [Abstract]
Available-for-sale, Securities, Debt Maturities, within One Year, Weighted Average Rate	1.65%
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Weighted Average Yield	1.72%
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Weighted Average Yield	2.84%
Available-for-sale Securities, Debt Maturities, after Ten Years, Weighted Average Yield	2.76%
Available-for-sale Securities, Debt Maturities, Weighted Average Yield	2.65%
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost	$ 4,555
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost	4,381
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after 10 Years, Amortized Cost	2,201
Debt Securities, Held-to-maturity	11,137	$ 12,075
Held-to-maturity Securities, Debt Maturities, Fair Value, Fiscal Year Maturity
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value	4,530
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value	4,377
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value	2,200
Debt Securities, Held-to-maturity, Fair Value	$ 11,107	$ 11,909
Debt Securities, Held-to-maturity, Maturity, Weighted Average Yield [Abstract]
Debt Securities, Held-to-maturity, Maturity, after One Through Five Years, Weighted Average Yield	2.40%
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Weighted Average Yield	3.31%
Held-to-maturity Securities, Debt Maturities, after Ten Years, Weighted Average Yield	2.87%
Held-to-maturity Securities, Debt Maturities, Weighted Average Yield	2.85%

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

Name:	us-gaap_HeldToMaturitySecuritiesDebtMaturitiesFairValueAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

Name:	us-gaap_HeldToMaturitySecuritiesDebtMaturitiesNetCarryingAmountAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Fair value of investment in debt security measured at amortized cost (held-to-maturity).

+ References

+ Details

Name:	us-gaap_HeldToMaturitySecuritiesFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant