ORGANIZATION AND BASIS OF PRESENTATION - Schedule of Assets and Liabilities of Premier LP (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Jun. 30, 2017
Assets
Current	$ 428,618	$ 408,812
Liabilities
Current	448,882	571,587
Variable Interest Entity, Primary Beneficiary
Assets
Current	393,863	385,477
Noncurrent	1,577,974	1,616,539
Total assets of Premier LP	1,971,837	2,002,016
Liabilities
Current	457,172	560,582
Noncurrent	128,793	134,635
Total liabilities of Premier LP	$ 585,965	$ 695,217