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Acquisitions (Schedule of Measurement Period Adjustments) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | --- | ---
Change in Accounting Estimate [Line Items] |  |  |
Current assets | $ 1,305,983 | $ 1,049,641 |
Property and equipment, net | 488,132 | 348,858 |
Goodwill | 899,364 | 826,629 | 714,800
Other long-term assets, including discontinued operations | 60,553 | 54,160 |
Current liabilities | 825,546 | 714,135 |
Scenario, Previously Reported [Member] |  |  |
Change in Accounting Estimate [Line Items] |  |  |
Current assets |  | 1,047,100 |
Property and equipment, net |  | 350,400 |
Goodwill |  | 820,300 |
Other long-term assets, including discontinued operations |  | 53,100 |
Current liabilities |  | 705,700 |
Scenario, Adjustment [Member] | Purchase Price Allocation Adjustments [Member] | 2012 Acquisitions [Member] |  |  |
Change in Accounting Estimate [Line Items] |  |  |
Current assets |  | 2,500 |
Property and equipment, net |  | (1,500) |
Goodwill |  | 6,300 |
Other long-term assets, including discontinued operations |  | 1,100 |
Current liabilities |  | $ 8,400 |

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