Earnings Per Share (Computation of Basic and Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Numerator:
Net income (loss)	$ 5,567	$ (3,683)	$ 5,108	$ (3,922)
Denominator:
Weighted average basic shares	11,369	12,018	11,382	12,029
Dilutive effect of restricted stock units	53		33
Weighted average diluted shares with assumed conversions	11,422	12,018	11,415	12,029
Net income (loss) per share:
Basic	$ 0.49	$ (0.31)	$ 0.45	$ (0.33)
Diluted	$ 0.49	$ (0.31)	$ 0.45	$ (0.33)