REVENUE RECOGNITION - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 29, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
NET SALES	$ 589,232	$ 608,218
Recreational Vehicle
Disaggregation of Revenue [Line Items]
NET SALES	320,220	342,436
Manufactured Housing
Disaggregation of Revenue [Line Items]
NET SALES	112,369	106,019
Industrial
Disaggregation of Revenue [Line Items]
NET SALES	78,592	68,977
Marine
Disaggregation of Revenue [Line Items]
NET SALES	78,051	90,786
Manufacturing
Disaggregation of Revenue [Line Items]
NET SALES	419,266	425,684
Manufacturing \| Recreational Vehicle
Disaggregation of Revenue [Line Items]
NET SALES	226,785	234,878
Manufacturing \| Manufactured Housing
Disaggregation of Revenue [Line Items]
NET SALES	45,605	42,203
Manufacturing \| Industrial
Disaggregation of Revenue [Line Items]
NET SALES	71,447	60,928
Manufacturing \| Marine
Disaggregation of Revenue [Line Items]
NET SALES	75,429	87,675
Distribution
Disaggregation of Revenue [Line Items]
NET SALES	169,966	182,534
Distribution \| Recreational Vehicle
Disaggregation of Revenue [Line Items]
NET SALES	93,435	107,558
Distribution \| Manufactured Housing
Disaggregation of Revenue [Line Items]
NET SALES	66,764	63,816
Distribution \| Industrial
Disaggregation of Revenue [Line Items]
NET SALES	7,145	8,049
Distribution \| Marine
Disaggregation of Revenue [Line Items]
NET SALES	$ 2,622	$ 3,111