Commitment and Contingencies - Performance Bonds and Letters of Credit (Details) - USD ($) $ in Thousands	Sep. 26, 2020	Dec. 31, 2019
Loss Contingencies
Self-insurance workers’ compensation	$ 24,688	$ 23,638
Legal	40,861	48,561
Liability and other insurance	18,208	16,678
Environmental	8,286	8,186
Other	7,010	5,864
Total outstanding performance bonds and stand-by letters of credit	99,053	102,927
Steve and Sons
Loss Contingencies
Total outstanding performance bonds and stand-by letters of credit	$ 40,000	$ 47,700