Net Income Per Share (Tables)

9 Months Ended

Sep. 30, 2011

Net Income (Loss) Attributable to Parent [Abstract]

Summary of the net income allocated to common shares and the basic and diluted shares used in the net income per share computations

The following table summarizes the net income allocated to common shares and the basic and diluted shares used in the net income per share computations for the three month and nine month periods ended September 30, 2011 and 2010:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2011			2010			2011			2010
	(in thousands, except per share amounts)
Net income	$	4,099		$	7,234		$	19,626		$	14,651
Less income allocated to participating securities		(120	)		(214	)		(582	)		(428	)
Net income allocated to common shares	$	3,979		$	7,020		$	19,044		$	14,223
Weighted average common shares outstanding		25,425			25,312			25,546			25,258
Incremental shares from assumed conversions of common stock options		74			111			98			105
Adjusted weighted average common shares outstanding		25,499			25,423			25,644			25,363
Potentially dilutive securities not included in weighted average share calculation due to anti-dilutive effect		54			339			21			492