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SECURITIES (Tables)

6 Months Ended

Mar. 31, 2021

Investments, Debt and Equity Securities [Abstract]

Securities Available for Sale

The amortized cost, gross unrealized gains and losses and estimated fair values of available for sale ("AFS") and held to maturity ("HTM") debt securities are presented below.

			Securities Available For Sale
(Dollars in Thousands)			Amortized Cost						Gross Unrealized Gains						Gross Unrealized (Losses)						Fair Value
At March 31, 2021
Debt securities AFS
SBA securities			$	166,348					$	3,846					$	(188)					$	170,006
Obligations of states and political subdivisions			2,807						10						(1)						2,816
Non-bank qualified obligations of states and political subdivisions			288,119						8,285						(682)						295,722
Asset-backed securities			453,686						2,726						(3,009)						453,403
Mortgage-backed securities			553,184						11,613						(5,964)						558,833
Total debt securities AFS			$	1,464,144					$	26,480					$	(9,844)					$	1,480,780
At September 30, 2020
Debt securities AFS
SBA securities			$	159,722					$	5,391					$	(158)					$	164,955
Obligations of states and political subdivisions			825						16						—						841
Non-bank qualified obligations of states and political subdivisions			314,819						8,978						(23)						323,774
Asset-backed securities			329,139						2,015						(6,229)						324,925
Mortgage-backed securities			439,879						14,567						(839)						453,607
Total debt securities AFS			$	1,244,384					$	30,967					$	(7,249)					$	1,268,102

Securities Held to Maturity

			Securities Held To Maturity
(Dollars in Thousands)			Amortized Cost						Gross Unrealized Gains						Gross Unrealized (Losses)						Fair Value
At March 31, 2021
Debt securities HTM
Non-bank qualified obligations of states and political subdivisions			$	67,709					$	1,083					$	—					$	68,792
Mortgage-backed securities			4,403						99						—						4,502
Total debt securities HTM			$	72,112					$	1,182					$	—					$	73,294
At September 30, 2020
Debt securities HTM
Non-bank qualified obligations of states and political subdivisions			$	87,183					$	1,040					$	(29)					$	88,194
Mortgage-backed securities			5,427						124						—						5,551
Total debt securities HTM			$	92,610					$	1,164					$	(29)					$	93,745

Schedule of Unrealized Loss on Investments, AFS

Gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous loss position, were as follows:

			LESS THAN 12 MONTHS												OVER 12 MONTHS												TOTAL
(Dollars in Thousands)			Fair Value						Gross Unrealized (Losses)						Fair Value						Gross Unrealized (Losses)						Fair Value						Gross Unrealized (Losses)
At March 31, 2021
Debt securities AFS
SBA securities			$	25,310					$	(24)					$	31,825					$	(164)					$	57,135					$	(188)
Obligations of state and political subdivisions			1,980						(1)						—						—						1,980						(1)
Non-bank qualified obligations of states and political subdivisions			53,328						(682)						—						—						53,328						(682)
Asset-backed securities			75,473						(782)						189,365						(2,227)						264,838						(3,009)
Mortgage-backed securities			291,358						(5,088)						35,484						(876)						326,842						(5,964)
Total debt securities AFS			$	447,449					$	(6,577)					$	256,674					$	(3,267)					$	704,123					$	(9,844)

			LESS THAN 12 MONTHS												OVER 12 MONTHS												TOTAL
(Dollars in Thousands)			Fair Value						Gross Unrealized (Losses)						Fair Value						Gross Unrealized (Losses)						Fair Value						Gross Unrealized (Losses)
At September 30, 2020
Debt securities AFS
SBA securities			$	32,257					$	(102)					$	9,875					$	(56)					$	42,132					$	(158)
Non-bank qualified obligations of states and political subdivisions			6,265						(6)						3,103						(17)						9,368						(23)
Asset-backed securities			106,474						(1,089)						178,686						(5,140)						285,160						(6,229)
Mortgage-backed securities			138,338						(839)						—						—						138,338						(839)
Total debt securities AFS			$	283,334					$	(2,036)					$	191,664					$	(5,213)					$	474,998					$	(7,249)

There were no debt securities HTM with a continuous loss position at March 31, 2021.

Schedule of Unrealized Loss on Investments, HTM

			LESS THAN 12 MONTHS												OVER 12 MONTHS												TOTAL
(Dollars in Thousands)			Fair Value						Gross Unrealized (Losses)						Fair Value						Gross Unrealized (Losses)						Fair Value						Gross Unrealized (Losses)
At September 30, 2020
Debt securities HTM
Non-bank qualified obligations of states and political subdivisions			$	7,397					$	(9)					$	3,637					$	(20)					$	11,034					$	(29)
Total debt securities HTM			$	7,397					$	(9)					$	3,637					$	(20)					$	11,034					$	(29)

Amortized Cost and Fair Value of Debt Securities by Contractual Maturity

The amortized cost and fair value of debt securities by contractual maturity are shown below. Certain securities have call features that allow the issuer to call the security prior to maturity. Expected maturities may differ from contractual maturities in mortgage-backed securities ("MBS") because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Therefore, MBS are not included in the maturity categories in the following maturity summary. The expected maturities of certain SBA securities may differ from contractual maturities because the borrowers may have the right to prepay the obligation. However, certain prepayment penalties may apply.

			At March 31, 2021												At September 30, 2020
(Dollars in Thousands)			Amortized Cost						Fair Value						Amortized Cost						Fair Value
Securities AFS at Fair Value
Due in one year or less			$	245					$	247					$	1,385					$	1,398
Due after one year through five years			17,621						18,199						20,805						21,769
Due after five years through ten years			51,152						52,585						32,441						34,025
Due after ten years			841,942						850,916						749,874						757,303
			910,960						921,947						804,505						814,495
Mortgage-backed securities			553,184						558,833						439,879						453,607
Total securities AFS, at fair value			$	1,464,144					$	1,480,780					$	1,244,384					$	1,268,102

			At March 31, 2021												At September 30, 2020
(Dollars in Thousands)			Amortized Cost						Fair Value						Amortized Cost						Fair Value
Securities HTM at Fair Value
Due after ten years			$	67,709					$	68,792					$	87,183					$	88,194
			67,709						68,792						87,183						88,194
Mortgage-backed securities			4,403						4,502						5,427						5,551
Total securities HTM, at cost			$	72,112					$	73,294					$	92,610					$	93,745

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Tabular disclosure of information about investment in debt security measured at amortized cost (held-to-maturity).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5B
-URI http://asc.fasb.org/extlink&oid=121645371&loc=SL120269825-111563

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5A
-URI http://asc.fasb.org/extlink&oid=121645371&loc=SL120269820-111563

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27232-111563

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For all investments in an unrealized loss position, including those for which other-than-temporary impairments have not been recognized in earnings (including investments for which a portion of an other-than-temporary impairment has been recognized in other comprehensive income), a tabular disclosure of the aggregate related fair value of investments with unrealized losses and the aggregate amount of unrealized losses (that is, the amount by which amortized cost basis exceeds fair value).

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