Benefit Plans - 401(k) Plan (Details) - USD ($) $ in Thousands		12 Months Ended
	Jan. 01, 2016	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Benefit Plans
401(k) Plan Matching contributions by the Company as percentage of employees' contributions	50.00%
401(k) Plan Maximum contributions by the Company as percentage of employees' gross pay	8.00%
401(k) Plan contributions		$ 7,914	$ 5,693	$ 4,632