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Regulatory Matters (Tables)

12 Months Ended

Sep. 30, 2018

Regulatory Capital Requirements [Abstract]

Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations

The following table presents the regulatory capital ratios for Timberland Bancorp at September 30, 2018 and 2017 (dollars in thousands):

	2018							2017
	Amount				Ratio			Amount				Ratio
Leverage Capital Ratio:
Tier 1 capital	$	120,175			12.0	%		$	107,145			11.5	%
Risk-based Capital Ratios:
Common equity Tier 1 capital	120,175				17.1			107,145				16.3
Tier 1 capital	120,175				17.1			107,145				16.3
Total capital	128,955				18.4			115,376				17.6

The following tables compare the Bank’s actual capital amounts at September 30, 2018 and 2017 to its minimum regulatory capital requirements and "Well Capitalized" regulatory capital at those dates (dollars in thousands):

September 30, 2018	Actual							Regulatory Minimum To Be "Adequately Capitalized"							Regulatory MinimumTo Be "Well Capitalized" Under Prompt Corrective Action Provisions
	Amount				Ratio			Amount				Ratio			Amount				Ratio
Leverage Capital Ratio:
Tier 1 capital	$	117,336			11.7	%		$	40,024			4.0	%		$	50,031			5.0	%
Risk-based Capital Ratios:
Common equity Tier 1 capital	117,336				16.7			31,539				4.5			45,557				6.5
Tier 1 capital	117,336				16.7			42,052				6.0			56,070				8.0
Total capital	126,109				18.0			56,070				8.0			70,087				10.0

September 30, 2017	Actual							Regulatory Minimum To Be "Adequately Capitalized"							Regulatory Minimum To Be "Well Capitalized" Under Prompt Corrective Action Provisions
	Amount				Ratio			Amount				Ratio			Amount				Ratio
Leverage Capital Ratio:
Tier 1 capital	$	104,102			11.2	%		$	37,116			4.0	%		$	46,395			5.0	%
Risk-based Capital Ratios:
Common equity Tier 1 capital	104,102				15.9			29,547				4.5			42,678				6.5
Tier 1 capital	104,102				15.9			39,395				6.0			52,527				8.0
Total capital	112,329				17.1			52,527				8.0			65,659				10.0

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- References

No definition available.

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- Definition

Tabular disclosure of the capital amounts and ratios as of the balance sheet date, indicating whether the entity or entities are in compliance with regulatory capital requirements, by entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958570-112826

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1H
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1G
-URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958577-112826

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