| **Earnings Per Share (Details) - $ / shares**                                   | 3 Months Ended | 9 Months Ended |
|---------------------------------------------------------------------------------|----------------|----------------|
||
| **Reconciliation of Weighted-Average Diluted Shares Outstanding**               |           |           |   |   |
| Weighted average common shares outstanding - basic                              | 66,073,000     | 65,865,000     | 66,032,000 | 65,825,000 |
| Pro Forma Weighted Average Shares Outstanding, Diluted                          | 66,073,000     | 65,865,000     | 66,032,000 | 65,825,000 |
| **Anti-dilutive Effect**                                                        |           |           |   |   |
| Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 1,033,000      | 636,000        | 974,000 | 667,000 |
| **Convertible Senior Note**                                                     |           |           |   |   |
| Convertible Note, Shares To Be Received Upon Conversion (in thousands)          |           |           | 2,300,000 |   |
| Convertible Note, Conversion Price                                              | $ 85.39        |           | $ 85.39 |   |
| Restricted stock                                                                |           |           |   |   |
| **Anti-dilutive Effect**                                                        |           |           |   |   |
| Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 719,000        | 588,000        | 655,000 | 585,000 |
| Other equity-based awards                                                       |           |           |   |   |
| **Anti-dilutive Effect**                                                        |           |           |   |   |
| Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 314,000        | 48,000         | 319,000 | 82,000 |

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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.
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| - Definition
The price per share of the conversion feature embedded in the debt instrument.
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| - Definition
The number of equity instruments that the holder of the debt instrument would receive if the debt was converted to equity.
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The weighted average number of shares or units and dilutive common stock or unit equivalents outstanding in the calculation of proforma diluted earnings per share (earnings per unit), which is commonly presented in initial public offerings based on the terms of the offering.
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| - Definition
Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.
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