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Summary of PSU Activity (Details) - Performance Stock Units (PSUs) [Member] - $ / shares		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Restricted Stock Units Outstanding
Restricted Stock Units Outstanding, Beginning of year	[1]	62,791
Restricted Stock Units Outstanding, Granted		108,957	[1]	62,791	[1]	0
Restricted Stock Units Outstanding, End of year	[1]	171,748		62,791
Weighted Average Grant Date Fair Value
Weighted Average Grant Date Fair Value, Beginning of year		$ 27.87
Weighted Average Grant Date Fair Value, Granted		28.72		$ 27.87
Weighted Average Grant Date Fair Value, End of year		$ 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 during 2018 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 in 2018 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
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
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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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X

- 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.

+ References

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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