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Note 4 - Goodwill and Other Intangible Assets - Changes in the Carrying Amount of Goodwill (Details) - USD ($)	9 Months Ended	18 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Sep. 30, 2018
Goodwill, gross amount			$ 1,535,155,000
Accumulated impairment losses			$ (1,288,979,000)
Goodwill, beginning of period	$ 246,176,000
Goodwill acquired in business combinations	3,551,000	$ 3,551,000
Goodwill, end of period	$ 249,727,000	$ 249,727,000

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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-Publisher FASB
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-Topic 350
-SubTopic 20
-Section 45
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X

- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

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- Definition

Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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