Summary Of Significant Accounting Policies (Schedule Of Supplemental Net Income Per Common Share) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Accounting Policies [Abstract]
Net income from continuing operations	$ 2,524	$ 10,676
Basic weighted average common shares outstanding	39,778	39,445
Effect of dilutive instruments	555	472
Diluted weighted average common shares outstanding	40,333	39,917
Net income from continuing operations per common share
Net income from continuing operations - basic (in dollars per share)	$ 0.06	$ 0.27
Net income from continuing operations - diluted (in dollars per share)	$ 0.06	$ 0.27