Net Income Per Share (Computation Of Basic And Diluted Net Income Per Share) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Numerator (basic and diluted):
Net income	$ 4,587	$ 3,992	$ 11,031	$ 8,628
Denominator (basic):
Weighted average common shares outstanding	35,117	33,473	34,975	32,853
Denominator (diluted):
Dilutive stock options	1,223	1,574	1,348	1,595
Diluted weighted average common shares outstanding	36,340	35,047	36,323	34,448
Net income per share attributable to holders of common stock:
Basic	$ 0.13	$ 0.12	$ 0.32	$ 0.26
Diluted	$ 0.13	$ 0.11	$ 0.30	$ 0.25