Consolidated Variable Interest Entities - Balance Sheets (Details) - USD ($) $ in Thousands	Sep. 27, 2020	Dec. 31, 2019
Assets
Total assets	$ 1,428,962	$ 1,371,299
Liabilities and stockholders’ equity
Total liabilities	1,266,953	1,383,208
Total equity	126,992	(43,760)
Total liabilities and equity	1,428,962	1,371,299
Variable Interest Entity, Primary Beneficiary
Assets
Total assets	138,177	127,742
Liabilities and stockholders’ equity
Total liabilities	83,596	80,151
Total equity	54,581	47,591
Total liabilities and equity	$ 138,177	$ 127,742