Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2012

Earnings Per Share [Abstract]

Computation Of Basic Earnings And Diluted Earnings Per Share Data

	Three months ended
	March 31,
	2012		2011
Numerator for basic and diluted earnings per share:
Net income	$	5,681	$	5,728
Denominator:
Weighted-average basic common shares outstanding		30,015		32,086
Assumed conversion of dilutive securities:
Stock options		2,515		1,634
Denominator for diluted earnings per share - Adjusted weighted-average shares		32,530		33,720
Earnings per common share:
Basic	$	0.19	$	0.18
Diluted	$	0.17	$	0.17