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Earnings Per Share (Summary of Antidilutive Securities) (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Stock Options
Incremental shares from stock options and restricted stock:
Antidilutive securities (in shares)	1,227	1,766	1,238	1,567
Restricted Stock
Incremental shares from stock options and restricted stock:
Antidilutive securities (in shares)	318	441	302	377
Performance Based Shares
Incremental shares from stock options and restricted stock:
Antidilutive securities (in shares)	345	313	349	299

X

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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X

- Definition

Schedule of antidilutive securities excluded from computation of earnings per share.

+ References

No definition available.

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