Acquisition, Goodwill, And Other Intangible Assets (Pro Forma Financial Information) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2010	Dec. 31, 2009
Acquisition, Goodwill, And Other Intangible Assets [Abstract]
Revenue	$ 355,433	$ 323,478
Net (loss) income	$ (21,890)	$ 5,490
Net (loss) income per basic share	$ (0.59)	$ 0.15
Net (loss) income per diluted share	$ (0.59)	$ 0.14