DEBT - Credit Facility (Details)			3 Months Ended		12 Months Ended
	Sep. 15, 2021 USD ($)	Dec. 10, 2019 USD ($)	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)
Line of Credit Facility [Line Items]
Letters of credit outstanding			$ 200,000		$ 200,000
Ratio of debt to EBITDA increase	0.50
Amortization of debt issuance costs			2,467,000	$ 1,275,000
Amortization of debt discount			879,000	7,346,000
Line of Credit
Line of Credit Facility [Line Items]
Unused commitment fees				600,000
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
Line of Credit Facility [Line Items]
Ratio of debt to EBITDA	2.50
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]
Interest expense				1,100,000
Amortization of debt issuance costs				$ 500,000
Credit Agreement | Line of Credit
Line of Credit Facility [Line Items]
Line of credit outstanding			0		0
Potential additional borrowing capacity	$ 116,000,000
Credit agreement, ratio of debt to EBITDA	3.00
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	80,000,000
Covenant threshold	20,000,000
Fees and expense paid to lenders at closing	2,800,000
Interest expense			400,000
Unused commitment fees			200,000
Amortization of debt issuance costs			200,000
Credit Agreement | Delayed Draw Term Loan | Line of Credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity	250,000,000
Fees and expense paid to lenders at closing	3,500,000
Unamortized debt discount	$ 2,500,000
Interest expense			5,100,000
Unused commitment fees			3,000,000
Amortization of debt issuance costs			1,200,000
Amortization of debt discount			$ 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%
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