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Stock Incentive Plans - Performance Stock Units (Details) - Performance Shares - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Number of Units
Beginning balance (in shares)	912,186	796,532	781,923
Granted (in shares)	347,981	352,035	296,050
Additional units from dividends (in shares)		9,556	40,662
Vested (in shares)	(290,927)	(245,937)	(251,375)
Forfeited (in shares)			(70,728)
Ending balance (in shares)	969,240	912,186	796,532
Weighted- Average Grant Date Fair Value
Beginning balance (in dollars per share)	$ 9.63	$ 11.16	$ 11.19
Granted (in dollars per share)	9.34	9.02	10.14
Additional unit from dividends (in dollars per share)		10.42	10
Vested (in dollars per share)	9.90	11.00	8.8
Forfeited (in dollars per share)			9.93
Ending balance (in dollars per share)	$ 9.45	$ 9.63	$ 11.16
Stock of common stock earned for the PSUs vested (as a percent)	100.00%	123.07%	74.33%

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

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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 weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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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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Percentage of vesting of award under share-based payment arrangement.

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