Note 17 - Subsequent Events	3 Months Ended
Mar. 31, 2022
Notes to Financial Statements
Subsequent Events [Text Block]	17. Subsequent Events: In March 2022, we entered into an additional ASR agreement with Morgan Stanley Bank, N.A. to repurchase shares of our common stock for an aggregate purchase price of $325.0 million. Upon payment of the aggregate purchase price on April 1, 2022, we received an initial delivery of 1,211,387 shares of our common stock at a price of $214.63 per share, representing approximately $260.0 million of the aggregate purchase price. Upon the final settlement of the ASR agreement in June 2022, 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 11. Stockholders' Equity for further discussion. **************

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-URI https://asc.fasb.org/topic&trid=2122774

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=6842918&loc=SL6314017-165662

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