Net Income Per Share: (Tables)

3 Months Ended

Mar. 31, 2012

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 March 31,
	2012		2011
Net income	$	7,601	$	8,073
Weighted average number of common shares outstanding (for basic calculation)	13,956		13,692
Dilutive securities	362		364
Weighted average common and common equivalent shares outstanding (for diluted calculation)	14,318		14,056
EPS — basic	$	0.54	$	0.59
EPS — diluted	$	0.53	$	0.57