Earnings Per Share (Reconciliation Of Common Shares Used In Denominator For Computing Basic And Diluted EPS) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Earnings Per Share [Abstract]
Weighted average shares of common stock outstanding, used in computing basic earnings per share (in shares)	34,167	33,705
Effect of dilutive stock options and restricted stock units	282	248
Weighted-average shares of common stock outstanding, used in computing diluted earnings per share (in shares)	34,449	33,953
Earnings per share of common stock:
Earnings per share of common stock, Basic (in dollars per share)	$ 0.30	$ 0.12
Earnings per share of common stock, Diluted (in dollars per share)	$ 0.29	$ 0.11