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Pro Forma Results of Operations (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Dec. 31, 2012
Business Combinations [Abstract]
Net sales	$ 28,843
Net income	$ 3,358
Net income per share (basic) (in dollars per share)	$ 0.63
Net income per share (diluted) (in dollars per share)	$ 0.62

- Definition

The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References+ Details

- Definition

The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References+ Details