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Employee Benefit Plans (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Defined Contribution Plan [Abstract] |  |  |
Defined contribution plan, eligibiilty, minimum employee age | 21 years |  |
Defined contribution plan, eligibility, minimum employee service time for participation eligibility | six months |  |
Defined contribution plan, employer discretionary contribution amount | $ 50 | $ 50 | $ 50
Deferred Compensation Arrangements [Abstract] |  |  |
Deferred compensation liability | 1,600 |  |
Deferred compensation assets | $ 2,300 |  |

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- Definition Defined Contribution Plan, Eligibility, Minimum Employee Age + References No definition available. + Details
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- Definition Defined Contribution Plan, Eligibility, Minimum Employee Service Time for Participation Eligibility + References No definition available. + Details
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- References No definition available. + Details
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- Definition Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements. Represents currently earned compensation under compensation arrangements that is not actually paid until a later date. + References No definition available. + Details
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- Definition Carrying amount as of the balance sheet date of assets held under deferred compensation agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- References No definition available. + Details
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- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
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