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SIGNIFICANT ACCOUNTING POLICIES - Warranty Costs (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Warranty accruals:    
Balance at beginning of year $ 5,030 $ 5,410
Less: Payments made during the year (4,091) (3,225)
Add: Warranty provision for the current year 3,817 3,095
Changes to warranty provision for prior years (115) (250)
Balance at end of year $ 4,641 $ 5,030
Warranty Costs    
Period of limited warranty on structural deck 5 years  
Period of transferable limited warranty to original owner 1 year  
Period of transferable hull warranty available to first subsequent owner 5 years  
Length of period after original retail purchase the 5-year transferable hull warranty terminates 5 years  
Minimum    
Warranty Costs    
Period of non-transferable warranty on additional items 1 year  
Maximum    
Warranty Costs    
Period of non-transferable warranty on additional items 5 years