Share-based Compensation Arrangement By Share-based Payment Award, Plan Modification, Number Of Shares Affected

No definition available.

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- Definition

Share-based Compensation Arrangement By Share-based Payment Award, Stock Option Repricing, Average Closing Price Period

+ References

No definition available.

+ Details

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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
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5047-113901

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

Unrecognized cost of unvested options awarded to employees as compensation.

+ 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

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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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option 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)(1)(i)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

No definition available.

+ Details

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Share-based Compensation - Equity Award Modifications (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		1 Months Ended	3 Months Ended		6 Months Ended	12 Months Ended
	Jun. 19, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense						$ 64,788	$ 38,071	$ 34,120
Stock compensation expense not yet recognized, options					$ 8,914	$ 8,914
Exercise prices (in dollars per share)					$ 19.30	$ 19.30	$ 21.81	$ 26.12	$ 25.84
Number of stock options outstanding (in shares)					9,903	9,903	10,928	11,427	10,919
Employee Time Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense					$ 15,000	$ 50,753	$ 27,543	$ 23,120
Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Average stock closing price period	20 days
Exercise prices (in dollars per share)	$ 17.44
Class A Common Stock \| Weighted Average
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share price (in dollars per share)	$ 17.44
Class B Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock options outstanding (in shares)	5,300
Class B Common Stock \| Employee Time Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense			$ 5,100
Stock compensation expense not yet recognized, options					$ 2,500	$ 2,500
2013 Long-Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise prices (in dollars per share)		$ 23.20		$ 23.20
2013 Long-Term Incentive Plan \| Employee Time Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares affected in modification of stock options (in shares)		5,338
Stock compensation expense				$ 6,000
Stock compensation expense not yet recognized, options		$ 5,000		$ 5,000