Represents the term (period to maturity) of held-to-maturity securities.

No definition available.

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- Definition

Represents the balance of interest rate swaps remaining in other comprehensive income, which amount will be amortized quarterly to interest expense.

+ References

No definition available.

+ Details

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

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- Definition

The carrying amount of the equity component of convertible debt which may be settled in cash upon conversion.

+ References

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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- Definition

Nominal or face amount used to calculate payments on the derivative liability.

+ References

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Note 9 - Fair Value Measurement (Details Textual) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Nov. 30, 2019	May 31, 2018
Derivative Liability, Notional Amount						$ 150.0
Interest Rate Swaps, Balance of Swaps Remaining in Other Comprehensive Income, Amount to Be Amortized Quarterly to Interest Expense		$ 5.4
The 2.75% Convertible Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage	2.75%		2.75%	2.75%	2.75%
Debt Instrument, Convertible, Carrying Amount of Equity Component	$ 24.5		$ 29.7	$ 31.4	$ 27.9
US Treasury and Government [Member] \| Minimum [Member]
Debt Securities, Held-to-maturity, Term (Year)	1 year
US Treasury and Government [Member] \| Maximum [Member]
Debt Securities, Held-to-maturity, Term (Year)	5 years
London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate	2.76%