Summary of Significant Accounting Policies - Inventory (Details) $ in Thousands		3 Months Ended
Oct. 11, 2018 USD ($)	Sep. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 13, 2019
Inventory, net
Raw materials		$ 133,224	$ 130,414
Work-in-progress		4,953	5,498
Finished goods		25,852	40,429
Total inventory		$ 164,029	$ 176,341
2018 Revolving Credit Facility
Long-term Debt, Unclassified [Abstract]
Debt to EBITDA ratio	5.5	5.5		5.5
Minimum liquidity amount	$ 160,000	$ 160,000

The minimum amount of liquidity should be maintained under debt covenants.

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- Definition

Represents the threshold multiplier on EBITDA to maintain net debt to EBITDA ratio under the debt instrument covenant.

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No definition available.

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- Definition

Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of merchandise or goods held by the company that are readily available for sale.

+ References

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of unprocessed items to be consumed in the manufacturing or production process.

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Carrying amount, net of reserves and adjustments, as of the balance sheet date of merchandise or goods which are partially completed. This inventory is generally comprised of raw materials, labor and factory overhead costs, which require further materials, labor and overhead to be converted into finished goods, and which generally require the use of estimates to determine percentage complete and pricing.

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