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Business Combinations (Pro Forma Impact Of Business Combination) (Details) (USD $)
In Thousands, except Per Share data
3 Months Ended9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Business Combinations [Abstract]    
Revenues, pro forma$ 138,565[1]$ 134,957[1]$ 406,531[1]$ 403,259[1]
Net (loss) income, pro forma(35,958)[1]19,299[1](15,888)[1]42,486[1]
Net (loss) income attributable to common shareholders, pro forma$ (42,089)[1]$ 8,718[1]$ (42,085)[1]$ 13,101[1]
Earnings per share - basic, pro forma$ (0.35)[1]$ 0.07[1]$ (0.35)[1]$ 0.11[1]
Earnings per share - diluted, pro forma$ (0.35)[1]$ 0.07[1]$ (0.35)[1]$ 0.11[1]
[1] There are no non-recurring pro forma adjustments included within or excluded from the amounts in the preceding table.