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v2.4.1.9

401(k) Retirement Savings Plan, Deferred Compensation Plan and Change in Control Severance Plan (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items] |  |  |
Employer contributions to 401(k) plans | $ 7.5 us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount | $ 6.0 us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount | $ 3.7 us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Document Fiscal Year Focus | 2014 |  |

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- Definition This is focus fiscal year of the document report in CCYY format. For a 2006 annual report, which may also provide financial information from prior periods, fiscal 2006 should be given as the fiscal year focus. Example: 2006. + References No definition available. + Details
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- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
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