DEBT - Credit Facility (Details)					9 Months Ended		12 Months Ended
	Jun. 01, 2022 USD ($)	May 31, 2022 USD ($)	Sep. 15, 2021 USD ($)	Dec. 10, 2019 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)	Jan. 01, 2022 USD ($)
Line of Credit Facility [Line Items]
Proceeds from term loan					$ 250,000,000	$ 0
Current portion of long-term debt					2,484,000		$ 166,008,000	$ 169,221,000
Letters of credit outstanding					200,000		200,000
Write-off of previously-capitalized debt issuance costs					0	1,066,000
Amortization of debt issuance costs					5,443,000	3,756,000
Amortization of debt discount					1,475,000	22,297,000
Revolving Credit Facility
Line of Credit Facility [Line Items]
Collateral, percent of domestic subsidiaries equity			100.00%
Collateral, percent of voting equity			65.00%
Collateral, percent of non-voting equity			100.00%
Letter of credit fronting fee percentage			0.125%
Letter of Credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity			$ 20,000,000
Fed Funds Effective Rate | Revolving Credit Facility
Line of Credit Facility [Line Items]
Basis spread on variable rate			0.50%
LIBOR | Revolving Credit Facility
Line of Credit Facility [Line Items]
Basis spread on variable rate			1.00%
Minimum | Revolving Credit Facility
Line of Credit Facility [Line Items]
Unused capacity, commitment fee percentage			0.25%
Letter of credit participation fee percentage			2.25%
Maximum | Revolving Credit Facility
Line of Credit Facility [Line Items]
Unused capacity, commitment fee percentage			0.50%
Letter of credit participation fee percentage			2.75%
Revolving Credit Facility | Line of Credit
Line of Credit Facility [Line Items]
Line of credit outstanding					0
Credit Agreement | Line of Credit
Line of Credit Facility [Line Items]
Line of credit outstanding							0
Potential additional borrowing capacity			$ 116,000,000
Credit agreement, ratio of debt to EBITDA			3.00
Ratio of debt to EBITDA			2.50
Ratio of debt to EBITDA increase			0.50
Restricted payment covenant total net leverage ratio			4.0
Premium percentage			0.010
Premium percentage period (in months)			6 months
Credit Agreement | Revolving Credit Facility | Line of Credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity			$ 200,000,000
Capacity available for general corporate purchases			79,800,000
Covenant threshold			20,000,000
Fees and expense paid to lenders at closing			2,800,000
Interest expense					1,100,000	3,000,000
Unused commitment fees					400,000	1,800,000
Amortization of debt issuance costs					700,000	1,200,000
Credit Agreement | Delayed Draw Term Loan | Line of Credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity			250,000,000
Proceeds from term loan		$ 250,000,000
Line of credit outstanding					249,400,000
Current portion of long-term debt					2,500,000
Fees and expense paid to lenders at closing			3,500,000
Unamortized debt discount			$ 2,500,000
Interest expense					13,500,000	700,000
Unused commitment fees					5,100,000	400,000
Amortization of debt issuance costs					2,000,000	200,000
Amortization of debt discount					$ 1,500,000	100,000
Credit Agreement | LIBOR | Delayed Draw Term Loan | Line of Credit
Line of Credit Facility [Line Items]
Basis spread on variable rate					6.87%
Interest expense recognized associated with the coupon rate					$ 4,900,000
Credit Agreement | Minimum | LIBOR | Revolving Credit Facility | Line of Credit
Line of Credit Facility [Line Items]
Basis spread on variable rate			2.25%
Credit Agreement | Minimum | LIBOR | Delayed Draw Term Loan | Line of Credit
Line of Credit Facility [Line Items]
Basis spread on variable rate			3.75%
Credit Agreement | Minimum | Base Rate | Revolving Credit Facility | Line of Credit
Line of Credit Facility [Line Items]
Basis spread on variable rate			1.25%
Credit Agreement | Minimum | Base Rate | Delayed Draw Term Loan | Line of Credit
Line of Credit Facility [Line Items]
Basis spread on variable rate			2.75%
Credit Agreement | Maximum | LIBOR | Revolving Credit Facility | Line of Credit
Line of Credit Facility [Line Items]
Basis spread on variable rate			2.75%
Credit Agreement | Maximum | LIBOR | Delayed Draw Term Loan | Line of Credit
Line of Credit Facility [Line Items]
Basis spread on variable rate			4.00%
Credit Agreement | Maximum | Base Rate | Revolving Credit Facility | Line of Credit
Line of Credit Facility [Line Items]
Basis spread on variable rate			1.75%
Credit Agreement | Maximum | Base Rate | Delayed Draw Term Loan | Line of Credit
Line of Credit Facility [Line Items]
Basis spread on variable rate			3.00%
2022 Convertible Notes
Line of Credit Facility [Line Items]
Proceeds used to settle outstanding balance of debt instrument	$ 170,200,000
Unamortized debt discount					0		3,260,000
Interest expense					800,000	7,100,000
Amortization of debt issuance costs					400,000	700,000
Interest expense recognized associated with the coupon rate					$ 400,000	800,000
Amortization of debt discount						$ 5,600,000
Amended Revolving Credit Facility | Revolving Credit Facility | Line of Credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity				$ 500,000,000
Debt term (in years)				5 years
Write-off of previously-capitalized debt issuance costs							$ 1,100,000