Business Segments Business Segments - Textuals (Details) - USD ($) $ in Thousands	12 Months Ended	48 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2018
Segment Reporting Information [Line Items]
Purchase Accounting Adjustments		$ 600	$ 5,100
Charges related to stucco-related claims	$ 860	0	0	$ 28,400
Total valuation adjustments and write-offs	$ 8,400	$ 5,000	$ 5,800

Amount of increase (decrease) in the standard and extended product warranty liability.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249

Name:	us-gaap_ProductWarrantyAccrualPeriodIncreaseDecrease
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration