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Nature of Business and Basis of Presentation (Policies)
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3 Months Ended |
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Mar. 31, 2013
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| Nature of Business and Basis of Presentation [Abstract] | |
| Use of Estimates in the Preparation of Financial Statements |
The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Significant estimates affecting the financial statements include accruals for contract disallowance reserves, recoverability of goodwill and intangible assets, self-insured health claims and earn-out obligations related to acquisitions consummated after January 1, 2009. |