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Summary of PSU Activity (Details) - Performance Stock Units (PSUs) [Member] - $ / shares		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restricted Stock Units Outstanding
Restricted Stock Units Outstanding, Beginning of year	[1]	171,748	62,791
Restricted Stock Units Outstanding, Granted	[1]	204,580	108,957	62,791
Restricted Stock Units Outstanding, End of year	[1]	376,328	171,748	62,791
Weighted Average Grant Date Fair Value
Weighted Average Grant Date Fair Value, Beginning of year		$ 28.41	$ 27.87
Weighted Average Grant Date Fair Value, Granted		14.13	28.72	$ 27.87
Weighted Average Grant Date Fair Value, End of year		$ 20.65	$ 28.41	$ 27.87
[1] The number of shares listed for PSUs granted during 2017 represents the actual number of PSUs granted to each recipient eligible to vest if the Company meets its performance goals for the applicable period. The number of shares listed for PSUs granted after 2017 represents the “target” number of PSUs granted to each recipient eligible to vest if the Company meets its “target” performance goals for the applicable period. The actual number of PSUs eligible to vest with respect to PSUs granted after 2017 will vary depending on whether or not the Company meets or exceeds the applicable threshold, target or maximum performance goals for the PSUs, with 200% of the “target” number of PSUs eligible to vest at “maximum” performance levels.

X

- Definition

The number of grants made 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).

+ References

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-Publisher FASB
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-Topic 718
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- Definition

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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- Definition

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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