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Earnings Per Share - Additional Information (Details) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Earnings Per Share
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	1,382,000	151,000	696,000	179,000
Weighted Average Price of Antidilutive Securities Excluded from Computation of Earnings Per Share (in dollars per share)	$ 26.56	$ 31.58	$ 28.51	$ 29.78

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- 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://fasb.org/us-gaap/role/ref/legacyRef
-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

+ Details

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- References

No definition available.

+ Details

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- Definition

The weighted average price of common stock or units for all dilutive potential common shares or units outstanding during the reporting period that were not included in the computation of diluted EPS or EPU.

+ References

No definition available.

+ Details

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