v3.10.0.1

Compensation Arrangements - 401(k) Defined Contribution Plan (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items] |  |  |
Maximum 401 (k) plan contribution rates as percentage of employees earnings | 75.00% |  |
Employer matching contribution, maximum (percentage) | 100.00% |  |
Initial employer 401(k) matching contribution to employee (percentage) | 4.00% |  |
Employer 401 (k) matching contribution to employee, 50% Maximum | 50.00% |  |
Compensation expense related to 401(k) savings plan | $ 6.9 | $ 5.7 | $ 5.4
Maximum |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Initial employer 401(k) matching contribution to employee (percentage) | 3.00% |  |
Minimum |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Initial employer 401(k) matching contribution to employee (percentage) | 2.00% |  |

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- Definition Defined Contribution Plan, Employee Contributions, Percentage of Eligible Compensation + References No definition available. + Details
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- Definition Defined Contribution Plan, Maximum Annual Contributions Per Employee, Tranche Two, Percent + References No definition available. + Details
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- Definition Initial Employer 401(K) Matching Contribution to Employee + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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 employer matches of the employee's percentage contribution matched. + References No definition available. + Details
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- Details
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- Details
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