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Retirement Savings Plan (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013
Postemployment Benefits [Abstract] |  |  |  |
Percentage of employee compensation plus matching contribution | 100.00% |  |  |
Percentage of maximum limit for employees to contribute their cash compensation | 75.00% |  |  |
Percentage of employee contribution | 4.00% |  |  |
Total plan expenses | $ 1.6 | $ 0.8 | $ 3.0 | $ 2.1

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- Definition Percentage Of Maximum Limit For Employees To Contribute Their Cash Compensation Under Plan. + References No definition available. + Details
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- Definition The amount of the cost recognized during the period for defined contribution plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942 + Details
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- Details
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