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Employee Retirement and Benefit Plans (Details Textual) $ in Millions	12 Months Ended
	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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