DEBT - Amended Credit Agreement (Details) | Sep. 03, 2020USD ($) | Sep. 02, 2020USD ($) | Dec. 31, 2018 | Sep. 30, 2020USD ($)Lender | Sep. 30, 2020USD ($)Lender | Dec. 31, 2020 |
Line of Credit Facility [Line Items] | | | | | | |
Leverage ratio | | | | | 3.75 | |
Interest coverage ratio | | | | | 3 | |
Maximum senior secured ratio | | | | | 2.50 | |
Line of credit | London Interbank Offered Rate (LIBOR) | Minimum | United States of America, Dollars | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Debt instrument, basis spread on variable rate | | | 3.50% | | | |
Line of credit | London Interbank Offered Rate (LIBOR) | Maximum | United States of America, Dollars | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Debt instrument, basis spread on variable rate | | | 4.50% | | | |
Line of credit | Base rate | Minimum | United States of America, Dollars | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Debt instrument, basis spread on variable rate | | | 2.50% | | | |
Line of credit | Base rate | Minimum | Canada, Dollars | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Debt instrument, basis spread on variable rate | | | 2.50% | | | |
Line of credit | Base rate | Maximum | United States of America, Dollars | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Debt instrument, basis spread on variable rate | | | 3.50% | | | |
Line of credit | Base rate | Maximum | Canada, Dollars | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Debt instrument, basis spread on variable rate | | | 3.50% | | | |
Line of credit | Canadian Dealer Offered Rate (CDOR) | Minimum | Canada, Dollars | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Debt instrument, basis spread on variable rate | | | 3.50% | | | |
Line of credit | Canadian Dealer Offered Rate (CDOR) | Maximum | Canada, Dollars | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Debt instrument, basis spread on variable rate | | | 4.50% | | | |
Line of credit | Bank Bill Swap Bid Rate (BBSY) | Minimum | Australia, Dollars | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Debt instrument, basis spread on variable rate | | | 3.50% | | | |
Line of credit | Bank Bill Swap Bid Rate (BBSY) | Maximum | Australia, Dollars | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Debt instrument, basis spread on variable rate | | | 4.50% | | | |
Credit facility | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Revolving credit facility, maximum borrowing capacity | | $ 15,000,000 | | | | |
Leverage ratio | | | | | 3.75 | |
Number of lenders | Lender | | | | 8 | 8 | |
Credit facility | Minimum | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Commitment fee percentage | | 0.51% | | | | |
Leverage ratio | | 4 | | | | |
Lender commitments, within credit agreement | | | | $ 22,400,000 | $ 22,400,000 | |
Credit facility | Maximum | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Commitment fee percentage | | 0.90% | | | | |
Leverage ratio | | 2 | | | | |
Lender commitments, within credit agreement | | | | 71,100,000 | 71,100,000 | |
Credit facility | Eurodollar Applicable Margin Rate, Bank Bill Swap Bid Rate (BBSY), and US Base Rate | Minimum | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Debt instrument, basis spread on variable rate | | 2.25% | | | | |
Credit facility | Eurodollar Applicable Margin Rate, Bank Bill Swap Bid Rate (BBSY), and US Base Rate | Maximum | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Debt instrument, basis spread on variable rate | | 4.00% | | | | |
Credit facility | Alternative Base Rate (ABR), Canadian Prime Rate, and US Base Rate | Minimum | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Debt instrument, basis spread on variable rate | | 1.25% | | | | |
Credit facility | Alternative Base Rate (ABR), Canadian Prime Rate, and US Base Rate | Maximum | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Debt instrument, basis spread on variable rate | | 3.00% | | | | |
Credit facility | US term loan | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Term loan, face amount | | | | 285,400,000 | 285,400,000 | |
Third Amendment to the Credit Agreement | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Revolving credit facility, maximum borrowing capacity | $ 10,000,000 | | | | | |
Third Amendment to the Credit Agreement | Minimum | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Commitment fee percentage | 0.875% | | | | | |
Leverage ratio | 3.50 | | | | | |
Third Amendment to the Credit Agreement | Maximum | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Commitment fee percentage | 1.125% | | | | | |
Leverage ratio | 2.50 | | | | | |
Third Amendment to the Credit Agreement | Eurodollar Applicable Margin Rate, Bank Bill Swap Bid Rate (BBSY), and US Base Rate | Minimum | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Debt instrument, basis spread on variable rate | 3.50% | | | | | |
Third Amendment to the Credit Agreement | Eurodollar Applicable Margin Rate, Bank Bill Swap Bid Rate (BBSY), and US Base Rate | Maximum | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Debt instrument, basis spread on variable rate | 4.50% | | | | | |
Third Amendment to the Credit Agreement | Alternative Base Rate (ABR), Canadian Prime Rate, and US Base Rate | Minimum | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Debt instrument, basis spread on variable rate | 2.50% | | | | | |
Third Amendment to the Credit Agreement | Alternative Base Rate (ABR), Canadian Prime Rate, and US Base Rate | Maximum | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Debt instrument, basis spread on variable rate | 3.50% | | | | | |
Revolving credit facility | Credit facility | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Revolving credit facility, maximum borrowing capacity | | | | 263,500,000 | 263,500,000 | |
Revolving credit facility | Third Amendment to the Credit Agreement | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Extended term | 18 months | | | | | |
Revolving credit facility, U.S. subsidiaries | Credit facility | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Revolving credit facility, maximum borrowing capacity | | $ 20,000,000 | | 20,000,000 | 20,000,000 | |
Outstanding letters of credit | | | | 300,000 | 300,000 | |
Revolving credit facility, U.S. subsidiaries | Third Amendment to the Credit Agreement | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Revolving credit facility, maximum borrowing capacity | $ 10,000,000 | | | | | |
Revolving credit facility, Canadian subsidiaries | Credit facility | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Revolving credit facility, maximum borrowing capacity | | 183,500,000 | | 183,500,000 | 183,500,000 | |
Outstanding letters of credit | | | | 2,600,000 | 2,600,000 | |
Revolving credit facility, Canadian subsidiaries | Third Amendment to the Credit Agreement | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Revolving credit facility, maximum borrowing capacity | 122,300,000 | | | | | |
Revolving credit facility, Australian subsidiaries | Credit facility | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Revolving credit facility, maximum borrowing capacity | | $ 60,000,000 | | 60,000,000 | 60,000,000 | |
Outstanding letters of credit | | | | $ 500,000 | 500,000 | |
Revolving credit facility, Australian subsidiaries | Third Amendment to the Credit Agreement | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Revolving credit facility, maximum borrowing capacity | $ 35,000,000 | | | | | |
Maximum Leverage Ratio | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Leverage ratio | | | | 4 | | |
Maximum Leverage Ratio | Revolving credit facility, Australian subsidiaries | Amended And restated syndicated facility agreement | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Gross proceeds from qualified offering of indebtedness | | | | | $ 150,000,000 | |
Scenario, Forecast | Credit facility | | | | | | |
Line of Credit Facility [Line Items] | | | | | | |
Leverage ratio | | | | | | 3.50 |