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Stock-Based Compensation - Summary of Nonvested Common Share and Common Share Unit Activity (Details) shares in Thousands	3 Months Ended
	Mar. 31, 2022 $ / shares shares
Nonvested shares | Time and Performance- Based Share Awards
Number of Shares
Outstanding at beginning of year (in shares)	500
Granted (in shares)	241
Vested (in shares)	(139)
Forfeited (in shares)	0
Outstanding at end of period (in shares)	602
Weighted Average Grant Date Fair Value
Outstanding at beginning of year (in dollars per share) | $ / shares	$ 31.29
Granted (in dollars per share) | $ / shares	15.35
Vested (in dollars per share) | $ / shares	45.32
Outstanding at end of period (in dollars per share) | $ / shares	$ 21.68
Nonvested shares | Time-Based Share Awards
Number of Shares
Outstanding at beginning of year (in shares)	140
Granted (in shares)	76
Vested (in shares)	(69)
Forfeited (in shares)	0
Outstanding at end of period (in shares)	147
Weighted Average Grant Date Fair Value
Outstanding at beginning of year (in dollars per share) | $ / shares	$ 45.31
Granted (in dollars per share) | $ / shares	46.91
Vested (in dollars per share) | $ / shares	44.86
Outstanding at end of period (in dollars per share) | $ / shares	$ 46.35
Share Units
Number of Shares
Outstanding at beginning of year (in shares)	461
Granted (in shares)	93
Vested (in shares)	(154)
Forfeited (in shares)	(5)
Outstanding at end of period (in shares)	395
Weighted Average Grant Date Fair Value
Outstanding at beginning of year (in dollars per share) | $ / shares	$ 47.94
Granted (in dollars per share) | $ / shares	43.27
Vested (in dollars per share) | $ / shares	47.68
Forfeited (in dollars per share) | $ / shares	48.64
Outstanding at end of period (in dollars per share) | $ / shares	$ 46.93
DEUs
Number of Shares
Outstanding at beginning of year (in shares)	28
Granted (in shares)	6
Vested (in shares)	(13)
Forfeited (in shares)	0
Outstanding at end of period (in shares)	21
Weighted Average Grant Date Fair Value
Outstanding at beginning of year (in dollars per share) | $ / shares	$ 41.75
Granted (in dollars per share) | $ / shares	41.53
Vested (in dollars per share) | $ / shares	41.20
Forfeited (in dollars per share) | $ / shares	40.76
Outstanding at end of period (in dollars per share) | $ / shares	$ 42.03

X

- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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