Acquisitions - Schedule of Acquisition of Identifiable Intangible Assets (Detail) - Worthington Samuel Coil Processing Llc $ in Thousands	Dec. 31, 2019 USD ($)
Business Acquisition [Line Items]
Total acquired identifiable intangible assets	$ 10,100
Customer relationships
Business Acquisition [Line Items]
Acquired finite lived intangible assets	$ 9,000
Useful Life (Years)	15 years
Trade Names
Business Acquisition [Line Items]
Acquired indefinite lived intangible assets	$ 1,100

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

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