Net Income Per Share (Computation Of Basic And Diluted Net Income Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Numerator (basic and diluted):
Net income	$ 7,598	$ 4,113	$ 16,755	$ 15,144
Denominator (basic):
Weighted average common shares outstanding	35,880	35,234	35,733	35,062
Denominator (diluted):
Dilutive stock options and other	636	918	862	1,205
Diluted weighted average common shares outstanding	36,516	36,152	36,595	36,267
Net income per share:
Basic	$ 0.21	$ 0.12	$ 0.47	$ 0.43
Diluted	$ 0.21	$ 0.11	$ 0.46	$ 0.42