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Equity Transactions	3 Months Ended
	Mar. 31, 2021
Equity [Abstract]
Equity Transactions	Equity Transactions Dividends Declared     On February 24, 2021, the Company declared a quarterly cash dividend of $0.82 per common share to be paid on May 14, 2021 to stockholders of record at the close of business on April 30, 2021. Common Stock Repurchases     During the three months ended March 31, 2021, the Company repurchased 19,912 common shares at a weighted average price of $251.07 per share, for a total cost, including fees and expenses, of $5.0 million under its share repurchase program. As of March 31, 2021, 702,730 shares remained available for repurchase. Under the terms of the program, the Company may repurchase shares of its common stock from time to time at its discretion through open market repurchases, privately negotiated transactions and/or other mechanisms, depending on price and prevailing market and business conditions. The program, which has no specified term, may be suspended or terminated at any time.

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No definition available.

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- Definition

The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(e)(1))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-URI http://asc.fasb.org/topic&trid=2208762

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