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Employee Benefit Plans - Employee Stock Ownership Plan - Profit Sharing 401(k) Plan (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Retirement Benefits [Abstract] |  |
Age for eligibility for Employee Benefits | 21 years |
Employee benefit plans, requisite time for service | 1 year |
Employee matching ratio | 50.00% |
Maximum annual contribution per employee | 6.00% |
Contribution plan expenses | $ 506 | $ 328

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- Definition Share Based Compensation And Postretirement Benefits, Period of Service Required For Eligibility + 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 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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