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Capital Stock	12 Months Ended
	Dec. 31, 2020
Equity [Abstract]
Capital Stock	CAPITAL STOCK In October 2015, our Board of Directors authorized us to repurchase an indeterminate number of shares of our common stock of up to an aggregate market value of $300 million; this authorization expired on February 26, 2018. On February 24, 2017, our Board of Directors authorized an additional share repurchase of up to an aggregate market value of $150 million; this authorization became fully utilized in November 2018. On November 6, 2018, our Board of Directors authorized an additional share repurchase of up to an aggregate market value of $250 million during a three-year period from November 6, 2018 to November 6, 2021. In the year ended December 31, 2020, we repurchased 338,521 shares of our common stock for $22.0 million. In the year ended December 31, 2019, we repurchased 443,877 shares of our common stock for $20.0 million. In the year ended December 31, 2018, we repurchased 4,523,934 shares of our common stock for approximately $214.7 million. As of December 31, 2020, we had approximately $143.4 million available to us for share repurchase under the $250 million authorization described above.

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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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