Net Income Per Share: (Tables)

6 Months Ended

Jun. 30, 2011

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

The following table presents the calculation of net earnings per common share (“EPS”) — basic and diluted.

	Three months ended June 30,				Six months ended June 30,
	2011		2010		2011		2010
Net income	$	9,493	$	7,713	$	17,566	$	11,968
Weighted average number of common shares outstanding (for basic calculation)	13,852		13,469		13,772		13,665
Dilutive securities	405		188		394		223
Weighted average common and common equivalent shares outstanding (for diluted calculation)	14,257		13,657		14,166		13,888
EPS — basic	$	0.69	$	0.57	$	1.28	$	0.88
EPS — diluted	$	0.67	$	0.56	$	1.24	$	0.86