Options and Awards Restricted Award Rollforward (Details) - $ / shares shares in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Restricted Stock Rollforward [Line Items]
Nonvested Restricted Awards, Nonvested at January 1, 2017			429
Weighted Average Grant Date Fair Value, Nonvested at January 1, 2017			$ 20.42
Issuance of restricted stock to employees	46	52	99	214
Weighted Average Grant Date Fair Value, Restricted Awards Granted in the Period			$ 19.40
Nonvested Restricted Awards, Vested in the Period			(75)
Weighted Average Grant Date Fair Value, Restricted Awards Vested in the Period			$ 18.79
Nonvested Restricted Awards, Forfeited in the Period			(7)
Weighted Average Grant Date Fair Value, Restricted Awards Forfeited in the Period			$ 18.97
Nonvested Restricted Awards, Nonvested at June 30, 2017	446		446
Weighted Average Grant Date Fair Value, Nonvested at June 30, 2017	$ 20.49		$ 20.49

[Line Items] for Restricted Stock Rollforward [Table]

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(3)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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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).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

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.

+ References

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-Publisher FASB
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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

+ References

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-Publisher FASB
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- Definition

Number of shares related to Restricted Stock Award forfeited during the period.

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-Topic 210
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Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards.

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