Employee Benefit Plans - Amortization Schedule (Details) - Death Benefit Plan - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Amortization of Net (Gain) Loss Calculation
Net (gain) loss	$ 280	$ 2,903
Net (gain) loss subject to amortization	280	2,903
Corridor (10% of greater of APBO or assets)	101	1,043
Net (gain)/loss in excess of corridor	$ 179	$ 1,860
Amortization years	16 years 7 months 6 days	5 years 9 months 18 days