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Fair Value Measurements (Details) (USD $) | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2014 business | Dec. 31, 2013 | Jun. 30, 2014 Senior Subordinated 6.25% Notes | Dec. 31, 2013 Senior Subordinated 6.25% Notes | Mar. 31, 2013 Senior Subordinated 6.25% Notes
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] |  |  |  |  |
Number of completed acquisitions | 1 |  |  |  |
Carrying value of outstanding debt | $ 213,600,000 | $ 214,007,000 | $ 210,000,000 | $ 210,000,000 |
Senior Subordinated Notes, interest rate |  |  | 6.25% |  | 6.25%

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