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Employee Benefit Plan (Narrative) (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Employee Benefit Plan [Abstract] |  |  |
Defined Contribution Plan Maximum Annual Contributions Per Employee Amount | $ 19,000 |  |
Defined Contribution Plan Cost Recognized | $ 923,000 | $ 856,000 | $ 836,000
Defined Contribution Plan Employer Matching Contribution Percent Of Match | 4.00% |  |
Defined Contribution Plan, Years Of Service For Vesting | 3 years |  |

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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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