Note 22 - Subsequent Events	12 Months Ended
Dec. 31, 2020
Notes to Financial Statements
Subsequent Events [Text Block]	22. Subsequent Events: In December 2020, we entered into an additional ASR agreement with HSBC Bank USA, N.A. to repurchase shares of our common stock for an aggregate purchase price of $50.0 million. Upon payment of the aggregate purchase price on January 4, 2021, we received an initial delivery of 192,687 shares of our common stock at a price of $207.59 per share, representing approximately $40.0 million of the aggregate purchase price. Upon the final settlement of the ASR agreement in March 2021, we may be entitled to receive additional shares of our common stock or, under certain limited circumstances, be required to deliver shares to the counter-party. See Note 16. Stockholders' Equity for further discussion. On January 15, 2021, we granted 706,851 stock options, 134,840 shares of restricted stock, and 59,144 performance share units to key employees. The stock options and restricted stock have a graded service vesting period of four years, and the performance share units have a three-year performance period, subject to the recipients' continued service. See Note 17. Compensation Plans for further discussion. On February 16, 2021, our Board approved an additional share repurchase authorization of $300.0 million. On February 17, 2021, our Board approved a cash dividend of $0.29 per share of common stock issued and outstanding, payable on March 31, 2021, to holders of record as of March 15, 2021.

Note 22 - Subsequent Events

12 Months Ended

Dec. 31, 2020

In December 2020, we entered into an additional ASR agreement with HSBC Bank USA, N.A. to repurchase shares of our common stock for an aggregate purchase price of $50.0 million. Upon payment of the aggregate purchase price on January 4, 2021, we received an initial delivery of 192,687 shares of our common stock at a price of $207.59 per share, representing approximately $40.0 million of the aggregate purchase price. Upon the final settlement of the ASR agreement in March 2021, we may be entitled to receive additional shares of our common stock or, under certain limited circumstances, be required to deliver shares to the counter-party. See Note 16. Stockholders' Equity for further discussion.

On January 15, 2021, we granted 706,851 stock options, 134,840 shares of restricted stock, and 59,144 performance share units to key employees. The stock options and restricted stock have a graded service vesting period of four years, and the performance share units have a three-year performance period, subject to the recipients' continued service. See Note 17. Compensation Plans for further discussion.

On February 16, 2021, our Board approved an additional share repurchase authorization of $300.0 million.

On February 17, 2021, our Board approved a cash dividend of $0.29 per share of common stock issued and outstanding, payable on March 31, 2021, to holders of record as of March 15, 2021.