Cash paid for RSU vesting and dividend payments.

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- Definition

Compensation expense, restricted stock.

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No definition available.

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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.

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No definition available.

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- Definition

Payout range minimum.

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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.

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- Definition

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

+ References

No definition available.

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 14
-Section F

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- Definition

Aggregate proceeds received by the entity during the annual period from exercises of stock or unit options and conversion of similar instruments granted under equity-based payment arrangements.

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

Unrecognized cost of unvested share-based compensation awards.

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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.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Paragraph 2
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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.

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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
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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.

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

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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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

Number of options outstanding, including both vested and non-vested options.

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- Definition

Description of pertinent provisions of equity-based compensation awards that have actual or potential impact upon the company's financial statements.

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- Definition

Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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- Definition

Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Stock-Based Compensation (Stock-Based Compensation Textuals) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized under stock option plan (shares)	2,426,451
Stock options outstanding (number of options)	1,763,000	2,211,000	3,078,000	4,437,000
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options outstanding (number of options)	1,763,316
Term life of stock options (years)	P10Y
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	4 years
Allocated Share-based Compensation Expense	$ 15,000	$ 140,000	$ 200,000
Cash proceeds from the exercise of stock options	185,000,000
Fair value of options exercisable	$ 888,000,000
Weighted average contractual life of outstanding options (in years)	2 years 3 months
Weighted average contractual life of exercisable options (in years)		2 years 9 months
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			3 years
Unrecognized compensation cost	$ 1,800,000
Number of restricted stock units granted	165,922	137,591	159,782
Compensation expense, restricted stock	$ 1,500,000	$ 1,800,000	$ 1,800,000
Unrecognized compensation cost, period for recognition (in years)	1 year 9 months
Total fair value of the restricted stock which vested	$ 2,000,000
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost, period for recognition (in years)	1 year 2 months
Total cash paid for vesting and dividend payments	$ 4,400,000
Estimate of future expense for all types of RSUs outstanding	2,000,000
Recognized compensation expense related to RSUs for employees and directors, before capitalization or income tax benefit, if any	$ 100,000	$ 5,400,000	$ 5,300,000
Performance-based RSU [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Number of restricted stock units granted	244,000	205,000	196,000
Payout range minimum	0.00%
Payout range maximum	200.00%
Share-based Compensation Arrangement by Share-based Payment Award, Targeted Number of Units Outstanding	241,370	159,745	160,107
Long-term incentive compensation [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense		$ (28,000)	$ (286,000)
Chief Executive Officer [Member] \| Performance-based RSU [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	5 years
Number of restricted stock units granted				281,532
Payout range minimum	0.00%
Payout range maximum	150.00%