Earnings (Loss) Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended												12 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Numerator:
Net loss	$ (9,701)	$ (16,592)	$ 5,084	$ (12,157)	$ (7,586)	$ 10,645	$ 12,362	$ (287,528)	$ (11,359)	$ 12,770	$ 14,022	$ 13,257	$ (33,366)	$ (272,107)	$ 28,690
Adjusted “if-converted” net income (loss)													$ (33,366)	$ (272,107)	$ 28,690
Denominator:
Basic weighted average common shares outstanding													38,592,618	37,779,812	37,127,306
Effect of potentially dilutive options and restricted stock awards															1,035,208
Diluted weighted average common shares outstanding													38,592,618	37,779,812	38,162,514
Earnings (loss) per common share:
Basic (in dollars per share)	$ (0.25)	$ (0.43)	$ 0.13	$ (0.32)	$ (0.20)	$ 0.28	$ 0.33	$ (7.65)	$ (0.30)	$ 0.34	$ 0.38	$ 0.36	$ (0.86)	$ (7.20)	$ 0.77
Diluted (in dollars per share)	$ (0.25)	$ (0.43)	$ 0.13	$ (0.32)	$ (0.20)	$ 0.27	$ 0.32	$ (7.65)	$ (0.30)	$ 0.33	$ 0.37	$ 0.35	$ (0.86)	$ (7.20)	$ 0.75
Anti-dilutive shares excluded in the computation of diluted earnings per share													6,600,000	1,900,000	3,000,000