INCOME TAXES: (Tables)

9 Months Ended

Mar. 31, 2018

Income Tax Disclosure [Abstract]

Summary of income tax benefit (expense) and corresponding effective tax rates

A summary of income tax benefit (expense) and corresponding effective tax rates is as follows:

	For the Three Months Ended March 31,						For the Nine Months   Ended March 31,
	2018			2017			2018			2017
	(Dollars in thousands)
Income tax benefit (expense)	$	2,225		$	(3,858	)	$	73,855		$	(7,317	)
Effective tax rate	86.4		%	48.3		%	389.9		%	332.7		%