Acquisitions Pro Forma Table (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
As Reported
Business Acquisition [Line Items]
Total revenue from continuing operations	$ 712,877	$ 660,848
Income from continuing operations	85,438	84,479
Net income	85,166	83,846
Income from continuing operations per basic share	$ 2.98	$ 2.91
Income from continuing operations per diluted share	$ 2.94	$ 2.86
Net income per basic share	$ 2.97	$ 2.89
Net income per diluted share	$ 2.93	$ 2.84
Pro Forma
Business Acquisition [Line Items]
Total revenue from continuing operations	758,289	718,398
Income from continuing operations	87,682	87,861
Net income	$ 87,410	$ 87,228
Income from continuing operations per basic share	$ 3.06	$ 3.02
Income from continuing operations per diluted share	$ 3.02	$ 2.97
Net income per basic share	$ 3.05	$ 3.00
Net income per diluted share	$ 3.01	$ 2.95

Business acquisitions pro forma revenue from continuing operations

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The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(2)-(3)

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The pro forma income from continuing operations before changes in accounting and extraordinary items, net of tax effect per basic share of common stock for a period as if the business combination or combinations had been completed at the beginning of a period.

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