Accounts Receivable	3 Months Ended
Accounts Receivable	Mar. 28, 2020
Receivables [Abstract]
Accounts Receivable	Accounts Receivable We sell our manufactured products to a large number of customers, primarily in the residential housing construction and remodel sectors, broadly dispersed across many domestic and foreign geographic regions. We assess the credit risk relating to our accounts receivable based on quantitative and qualitative factors, primarily historical credit collections within each region where we have operations. We perform ongoing credit evaluations of our customers to minimize credit risk. We do not usually require collateral for accounts receivable but will require advance payment, guarantees, a security interest in the products sold to a customer, and/or letters of credit in certain situations. Customer accounts receivable converted to notes receivable are primarily collateralized by inventory or other collateral. As of January 1, 2020, we adopted ASC 326 - Measurement of Credit Losses on Financial Instruments on a modified retrospective basis, which increased the allowance for doubtful accounts by $7.6 million on the date of adoption. At March 28, 2020 and December 31, 2019, we had an allowance for doubtful accounts of $13.0 million and $6.0 million, respectively.

The entire disclosure for claims held for amounts due a entity, excluding financing receivables. Examples include, but are not limited to, trade accounts receivables, notes receivables, loans receivables. Includes disclosure for allowance for credit losses.