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Acquisitions Pro Forma Table (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012
As Reported |  |
Business Acquisition [Line Items] |  |
Total revenue from continuing operations | $ 660,848 | $ 592,091
Income from continuing operations | 84,479 | 80,862
Net income | 83,846 | 80,359
Income from continuing operations per basic share | $ 2.91 | $ 2.80
Income from continuing operations per diluted share | $ 2.86 | $ 2.72
Net income per basic share | $ 2.89 | $ 2.78
Net income per diluted share | $ 2.84 | $ 2.70
Pro Forma |  |
Business Acquisition [Line Items] |  |
Total revenue from continuing operations | 713,329 | 672,411
Income from continuing operations | 89,971 | 89,908
Net income | $ 89,338 | $ 89,405
Income from continuing operations per basic share | $ 3.09 | $ 3.11
Income from continuing operations per diluted share | $ 3.04 | $ 3.03
Net income per basic share | $ 3.07 | $ 3.09
Net income per diluted share | $ 3.02 | $ 3.01

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