INCOME TAXES: (Tables)

3 Months Ended

Sep. 30, 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 September 30,
	2018			2017
	(Dollars in thousands)
Income tax benefit (expense)	$	714		$	(5,559	)
Effective tax rate	60.7		%	39.7		%