Earnings (Loss) Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2018	Dec. 31, 2017
Earnings (Loss) Per Common Share
Net income (loss)	$ 12,362	$ 14,022	$ (275,166)	$ (275,166)	$ 27,279
Basic weighted average common shares outstanding	37,761,176	37,066,902		37,674,200	37,029,483
Effect of potentially dilutive stock options and restricted stock awards	1,351,371	1,223,456			1,058,343
Diluted weighted average common shares outstanding	39,112,547	38,290,358		37,674,200	38,087,826
Earnings (loss) per common share:
Basic (in dollars per share)	$ 0.33	$ 0.38		$ (7.30)	$ 0.74
Diluted (in dollars per share)	$ 0.32	$ 0.37		$ (7.30)	$ 0.72
Anti-dilutive shares excluded in the computation of diluted earnings per share	540,000	3,000,000		2,200,000	3,000,000