Earnings (Loss) Per Share of Common Stock - Reconciliation of Numerator and Denominator for Basic and Diluted Earnings (loss) Per Share Calculation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Earnings Per Share [Abstract]
Net (loss) income available to common stockholders		$ (1,397)	$ 15,402	$ (4,139)	$ (37,873)
Weighted-average number of common shares outstanding – Basic and Diluted		77,025	77,055	77,046	77,056
Basic and diluted (loss) earnings per share		$ (0.02)	$ 0.20	$ (0.05)	$ (0.49)
Weighted-average number of anti-dilutive options and restricted stock	[1]	130		43

[1] Weighted-average number of anti-dilutive options and restricted stock are based upon the average closing price of our common stock on the NYSE for the period.