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Employee Retirement and Benefit Plans (Details Textual) $ in Millions | 12 Months Ended
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Dec. 31, 2018 USD ($) Plan Employee | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
Defined Contribution Plan Disclosure [Line Items] |  |  |
Number of defined contributions benefit plan | Plan | 2 |  |
Defined Benefit Plan, Contributions by Employer | $ 0.2 | $ 0.2 | $ 0.3
Defined contribution plan, employers matching contribution, vesting period | 5 years |  |
Total contributions for multiemployer pension and benefit plans | 5.00% |  |
Pension Plans [Member] | American Acquisition [Member] |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Number of employees participating in multiemployer benefit and pension plans | Employee | 2,000 |  |
Expenses related multiemployer health and welfare and defined benefit pension plans | $ 11.0 | $ 2.1 | $ 0.0
Maximum [Member] |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Defined contribution plan, maximum annual contributions per employee, percent | 75.00% |  |

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- Definition Expenses related multi-employer health and welfare and defined benefit pension plans. + References No definition available. + Details
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- Definition Multiemployer plans, collective-bargaining arrangement, number of participants. + References No definition available. + Details
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- Definition Number of defined contribution benefit plan. + References No definition available. + Details
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- Definition Amount of contribution received by defined benefit plan from employer which increases plan assets. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=112275985&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e2709-114920 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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