Goodwill and Other Identifiable Intangible Assets (Details) $ in Thousands	9 Months Ended
	Jun. 30, 2021 USD ($)
Goodwill [Abstract]
Balance - beginning of period	$ 113,059
Acquired goodwill during the nine months ended June 30, 2021	38,505
Balance - end of period	151,564
Identifiable Intangible Assets [Abstract]
Balance - beginning of period	61,304
Acquired identifiable intangible assets during the six months ended June 30, 2021	12,700
Balance - end of period	$ 74,004