Cash paid for RSU vesting and dividend payments.

No definition available.

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- Definition

Compensation expense, restricted stock.

+ References

No definition available.

+ Details

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- Definition

Estimate of future expense for all types of RSUs outstanding.

+ References

No definition available.

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- Definition

Payout range maximum.

+ References

No definition available.

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- Definition

Payout range minimum.

+ References

No definition available.

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- Definition

Recognized compensation expense related to RSUs for employees and directors, before capitalization or income tax benefit, if any.

+ References

No definition available.

+ Details

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Targeted Number of Units Outstanding

+ References

No definition available.

+ Details

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- Definition

Types of performance-based RSUs

+ References

No definition available.

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- Definition

Unrecognized cost of unvested share-based compensation awards.

+ 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 (i)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ 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 (a)(1)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- 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

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)(1)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

+ 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 (d)(2)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Stock-Based Compensation (Restricted Stock Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($) award shares	Dec. 31, 2016 USD ($) award shares	Dec. 31, 2015 USD ($) award shares	Dec. 31, 2012 shares
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted stock units granted (in shares)	308,000	235,000	166,000
Compensation expense, restricted stock \| $	$ 2,000	$ 1,600	$ 1,500
Unrecognized compensation cost \| $	$ 2,600
Unrecognized compensation cost, period for recognition (in years)	1 year 9 months
Fair value of restricted stock that vested \| $	$ 2,000
Restricted Stock \| Independent Board of Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted stock units granted (in shares)	120,878	72,771	78,985
Restricted Stock \| Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted stock units granted (in shares)	308,289	234,965	165,922
Vesting period	3 years
Performance-based RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted stock units granted (in shares)	399,000	312,000	244,000
Types of performance-based RSUs \| award		2,000	2,000
Targeted number of units outstanding (in shares)	396,384	391,684	295,472
Performance-based RSUs \| Key Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted stock units granted (in shares)				281,532
Vesting period	3 years
Types of performance-based RSUs \| award	2
Payout range minimum	0.00%			0.00%
Payout range maximum	200.00%			150.00%
Time-vested RSUs \| Key Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted stock units granted (in shares)	264,723	28,938
Vesting period	3 years	3 years
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost, period for recognition (in years)	1 year 2 months
Estimate of future expense for all types of RSUs outstanding \| $	$ 4,900
Total cash paid for vesting and dividend payments \| $	5,600
Recognized compensation expense related to RSUs for employees and directors, before capitalization or income tax benefit, if any \| $	$ 7,000	$ 6,400	$ 67