FINANCING ARRANGEMENTS (Details)								1 Months Ended		12 Months Ended
	Nov. 19, 2020 USD ($)	May 15, 2020 USD ($)	Apr. 16, 2020 USD ($)	Jul. 28, 2018 USD ($)	Jul. 20, 2018 USD ($)	Mar. 30, 2018 USD ($)	May 28, 2015 USD ($)	Nov. 30, 2019 USD ($)	Jul. 31, 2018 USD ($) shares	Feb. 28, 2021 USD ($)	Feb. 29, 2020 USD ($)	Feb. 28, 2019 USD ($)	May 31, 2020 USD ($)	Apr. 12, 2019 USD ($)	May 31, 2015 USD ($)
Debt Instrument [Line Items]
Fair value of convertible notes										$ 212,000,000	$ 225,000,000
Repayment of revolving credit facility										20,000,000
Loss on extinguishment of debt											(2,408,000)	$ (2,033,000)
Repayments of convertible debt										27,599,000	94,683,000	53,683,000
Repurchase of common stock												$ 49,000,000
Synovia Solutions LLC (“Synovia”) [Member]
Debt Instrument [Line Items]
Percentage of subscription contract value on sales price paid														80.00%
Fair value of debt														$ 19,700,000
Pre-tax cost of debt percentage														4.70%
Unamortized discount														$ 1,500,000
Interest expense related to debt recognized										500,000	700,000
Non-cash revenue recognized from arrangements with financial institutions										6,300,000	$ 6,800,000
2025 Convertible Notes [Member]
Debt Instrument [Line Items]
Aggregate principal amount										$ 230,000,000.0
Debt instrument, face amount					$ 230,000,000.0
Fixed interest rate					2.00%
Proceeds from sale of notes					$ 222,700,000
Issuance costs				$ 7,300,000	7,300,000
Amount utilized from net proceeds of offering					90,000,000.0
Purchase of note hedges, net of tax					21,200,000				$ 15,900,000
Repurchase of common stock					15,000,000.0
Indebtedness for excess money borrowed					10,000,000
Indebtedness, entry of judgments for payment					$ 15,000,000
Debt instrument, covenant description										The 2025 Indenture contains customary terms and conditions, including that upon certain events of default occurring and continuing, either the trustee, by notice to us, or the holders of at least 25% in aggregate principal amount of the then outstanding Notes, by notice to us and the trustee, may declare the principal amount of, and all accrued and unpaid interest on, all of the 2025 Convertible Notes then outstanding to become due and payable immediately. Such events of default include, without limitation, the default by us or any of our subsidiaries with respect to indebtedness for borrowed money in excess of $10 million and the entry of judgments for the payment of $15 million or more against us or any of our subsidiaries, which are not paid, discharged or stayed within 60 days.
Maturity date					Aug. 01, 2025
Debt instrument, redemption, description										We may redeem the Notes at our option at any time on or after August 6, 2022 at a cash redemption price equal to the principal amount plus accrued interest, but only if the last reported sale price per share of our stock exceeds 130% of the conversion price on (i) each of at least 20 trading days, whether or not consecutive, during the 30 consecutive trading days ending on, and including, the trading day immediately before the date we send the related redemption notice; and (ii) the trading day immediately before the date we send such notice.
Number of common stock with hedge transactions | shares									7,480,000
Conversion rate of shares of common stock				32.5256					41.3875
Payments for notes hedges									$ 21,200,000
2020 Convertible Notes [Member]
Debt Instrument [Line Items]
Fair value of convertible notes					$ 47,600,000
Debt instrument, face amount															$ 172,500,000
Fixed interest rate															1.625%
Aggregate amount of notes repurchase					50,000,000			$ 94,900,000
Repurchases of notes including accrued interest					53,800,000			94,700,000
Allocated notes repurchase price					53,700,000
Notes repurchase price, equity component					6,100,000
Carrying value of repurchased notes					45,600,000			92,300,000
Loss on extinguishment of debt					(2,000,000.0)			(2,400,000)
Fair value of the liability								$ 94,700,000
Repayments of convertible debt		$ 27,600,000
Issuance costs							$ 4,300,000
Conversion rate of shares of common stock							36.2398
2020 Convertible Notes [Member] | Additional Paid in Capital [Member]
Debt Instrument [Line Items]
Proceeds from unwind of the note hedge and warrants					$ 3,100,000
2020 Convertible Notes [Member] | Discount Rate [Member]
Debt Instrument [Line Items]
Market interest rate used to discount nonconvertible debt					0.0436
Paycheck Protection Program [Member] | JPMorgan Chase Bank, N.A [Member]
Debt Instrument [Line Items]
Proceeds from loan amount			$ 10,000,000
Maximum [Member] | 2025 Convertible Notes [Member]
Debt Instrument [Line Items]
Debt instrument, default judgment payment period					60 days
Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity						$ 50,000,000
Maturity date						Mar. 30, 2022
Credit facility bear interest										highest of (i) 0%, (ii) the rate of interest publicly announced by JP Morgan Chase Bank, N.A. (the “Agent”) as its prime rate in effect at its principal office in New York City, (iii) the overnight bank funding rate as determined by the Federal Reserve Bank of New York plus 0.50% and (iv) the LIBOR-based rate for a one-month interest period on such day plus 1%; or (b) for Eurodollar loans, the higher of (x) 1.00% and (y) the LIBOR-based rate for one, three or six months (as selected by the Company) for Eurodollar deposits. An applicable margin is added based on the Company’s senior leverage ratio, ranging from 1.50% to 2.00% for base rate loans, and from 2.50% to 3.00% for Eurodollar loans. We will also pay a commitment fee based on our senior leverage ratio ranging from 0.40% to 0.50%, payable quarterly in arrears, on the average daily unused amount of the Credit Facility.
Credit facility interest rate										0.00%
Borrowings outstanding										$ 0			$ 20,000,000
Repayment of revolving credit facility	$ 20,000,000
Accrued interest	$ 100,000
Revolving Credit Facility | Federal Home Loan Bank Of New York [Member]
Debt Instrument [Line Items]
Variable interest rate										0.50%
Revolving Credit Facility | LIBOR [Member]
Debt Instrument [Line Items]
Variable interest rate										1.00%
Description of variable rate basis										LIBOR-based rate for one, three or six months
Revolving Credit Facility | Eurodollar [Member]
Debt Instrument [Line Items]
Variable interest rate										1.00%
Revolving Credit Facility | Minimum [Member] | Eurodollar [Member]
Debt Instrument [Line Items]
Senior leverage ratio										2.50%
Revolving Credit Facility | Minimum [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Senior leverage ratio										1.50%
Revolving Credit Facility | Minimum [Member] | Prime Rate [Member]
Debt Instrument [Line Items]
Senior leverage ratio										0.40%
Revolving Credit Facility | Maximum [Member] | Eurodollar [Member]
Debt Instrument [Line Items]
Senior leverage ratio										3.00%
Revolving Credit Facility | Maximum [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Senior leverage ratio										2.00%
Revolving Credit Facility | Maximum [Member] | Prime Rate [Member]
Debt Instrument [Line Items]
Senior leverage ratio										0.50%