Earnings Per Share (Computation of Basic and Diluted Earnings Per Share) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended																12 Months Ended
	Sep. 30, 2014		Jun. 30, 2014		Mar. 31, 2014		Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2012		Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2012
Numerator:
Income from continuing operations	$ 2,429		$ 2,947		$ 6,976		$ 7,268		$ 17,334		$ 9,083		$ 6,202		$ 7,120		$ 19,620		$ 39,739		$ 28,743
Income from discontinued operations																	9,604		2,337		914
Net income	$ 2,429		$ 2,947		$ 15,593		$ 8,255		$ 18,568		$ 9,305		$ 6,818		$ 7,385		$ 29,224		$ 42,076		$ 29,657
Denominator:
Weighted average basic shares																	12,003		11,948		11,850
Dilutive effect of restricted stock units																	55		46		75
Weighted average diluted shares with assumed conversions																	12,058		11,994		11,925
Net earnings per share:
Continuing operations	$ 0.20		$ 0.25		$ 0.58		$ 0.61		$ 1.45		$ 0.76		$ 0.52		$ 0.60		$ 1.63		$ 3.32		$ 2.43
Discontinued operations																	$ 0.80		$ 0.20		$ 0.07
Basic earnings per share	$ 0.20	[1]	$ 0.25	[1]	$ 1.30	[1]	$ 0.69	[1]	$ 1.55	[2]	$ 0.78	[2]	$ 0.57	[2]	$ 0.62	[2]	$ 2.43	[1]	$ 3.52	[2]	$ 2.50
Continuing operations	$ 0.20		$ 0.24		$ 0.58		$ 0.60		$ 1.44		$ 0.76		$ 0.52		$ 0.60		$ 1.62		$ 3.32		$ 2.41
Discontinued operations																	$ 0.80		$ 0.19		$ 0.08
Diluted earnings per share	$ 0.20	[1]	$ 0.24	[1]	$ 1.29	[1]	$ 0.68	[1]	$ 1.54	[2]	$ 0.78	[2]	$ 0.57	[2]	$ 0.62	[2]	$ 2.42	[1]	$ 3.51	[2]	$ 2.49

[1] The increase in earnings per share for the second quarter of Fiscal 2014 was primarily due to the sale of Transdyn. For additional information on this disposition, see Note N.

[2] The increase in earnings per share for the fourth quarter of Fiscal 2013 was primarily driven by the release of our Canadian valuation allowance. For an explanation of the effective tax rate in Fiscal 2013, see Note H.