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U.S. Tax Reform (Details) - USD ($)	3 Months Ended			9 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2019	Jun. 30, 2018	Sep. 30, 2018
Investments, Owned, Federal Income Tax Note [Line Items]
Effective Income Tax Rate						24.50%
Income tax expense	$ 1,552,000	$ 1,334,000		$ 4,262,000	$ 4,331,000
Change in tax rate, deferred tax asset, income tax expense (benefit)				$ 551,000
Deferred Tax Asset
Investments, Owned, Federal Income Tax Note [Line Items]
Income tax expense			$ 548,000

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