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Benefit Plans (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2015 USD ($) plan | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($)
Compensation and Retirement Disclosure [Abstract] |  |  |
Number of defined-contribution 401(k) plans | plan | 2 |  |
Percentage of employer match | 100.00% |  |
Percent of employees' gross pay matched | 6.00% |  |
Vesting schedule for employer's matching funds | 3 years |  |
Matching contributions made by the company during the year | $ | $ 7.3 | $ 6.6 | $ 6.1

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- Definition Represents the period over which the matching contributions vest under the defined contribution plan. + References No definition available. + Details
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- Definition Represents the number of defined-contribution 401(k) plans. + References No definition available. + Details
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Balance Type: | na
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- 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=49170846&loc=d3e28014-114942 + Details
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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
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