Goodwill and Core Deposit Intangibles - Changes in Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Goodwill [Line Items]
Goodwill	$ 25,638	$ 25,638
Core Deposits
Goodwill [Line Items]
Amortization expense related to core deposit intangibles in acquisitions	$ 1,421	$ 2,029	$ 2,645

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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