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
Dec. 31, 2013	Dec. 31, 2012
Numerator:
Net income	$ 8,255	$ 7,385
Denominator:
Weighted average basic shares	11,994	11,922
Dilutive effect of stock options and restricted stock units	60	78
Weighted average diluted shares with assumed conversions	12,054	12,000
Net earnings per share:
Continuing operations	$ 0.61	$ 0.60
Discontinued operations	$ 0.08	$ 0.02
Basic earnings per share	$ 0.69	$ 0.62
Continuing operations	$ 0.60	$ 0.60
Discontinued operations	$ 0.08	$ 0.02
Diluted earnings per share	$ 0.68	$ 0.62

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