Employee Benefit Plans - Net Periodic Benefit Costs (Detail) - Pension Plan - USD ($) $ in Thousands	1 Months Ended	11 Months Ended	12 Months Ended
	Aug. 14, 2013	Jun. 30, 2014	Jun. 30, 2016	Jun. 30, 2015
Components of net periodic benefit costs:
Service cost		$ 1,331	$ 3,618	$ 3,676
Interest cost		9,127	20,298	22,891
Expected return on plan assets		(9,905)	(24,044)	(25,730)
Curtailment gain		(75)
Net periodic cost (benefit)		$ 478	$ (128)	$ 837
Predecessor
Components of net periodic benefit costs:
Interest cost	$ 38
Net periodic cost (benefit)	$ 38