Percentage of award earned based on performance of absolute return to stockholders.

No definition available.

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- Definition

Percentage of award earned based on performance of relative return to stockholders.

+ References

No definition available.

+ Details

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- Definition

Performance measurement period, end date.

+ References

No definition available.

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- Definition

Performance measurement period, start date.

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No definition available.

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- Definition

Total return to stockholders for participants to fully earn awards on absolute basis.

+ References

No definition available.

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- Definition

Total return to stockholders for participants to start to earn awards on absolute basis.

+ References

No definition available.

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- Definition

Share based compensation arrangement by share based payment award additional vesting period for executive officers.

+ References

No definition available.

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- Definition

Share based compensation arrangement by share based payment award grant date fair value.

+ 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
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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

Additional share-based compensation cost recognized as a result of an occurrence of an event that accelerates its recognition.

+ References

No definition available.

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- Definition

Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, 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

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

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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 difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

+ 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

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- Definition

Percentage of vesting of share-based compensation awards.

+ References

+ Details

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Incentive Compensation - Additional Information (Details) - USD ($)		3 Months Ended		9 Months Ended
	Jan. 30, 2017	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense		$ 3,825,000	$ 2,583,000	$ 11,692,000	$ 8,766,000
Acceleration of vesting stock awards					$ 1,855,000
Equity Incentive Plan [Member] \| Full Value Awards [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares available for grant		10,369,943		10,369,943
2017 Performance Program [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Performance measurement period, term	3 years
Performance measurement period, start date	Jan. 01, 2017
Performance measurement period, end date	Dec. 31, 2019
Percentage of award earned based on performance of absolute shareholder return	25.00%
Percentage of award earned based on performance of relative shareholder return	75.00%
Fair value of awards granted	$ 10,520,000
Additional vesting period for executive officers	1 year
Vesting period	4 years
2017 Performance Program [Member] \| Share-Based Compensation Award Tranche One [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of the awards that vest	50.00%
2017 Performance Program [Member] \| Share-Based Compensation Award Tranche Two [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of the awards that vest	50.00%
2017 Performance Program [Member] \| Minimum \| At 30th Percentile [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total shareholder return for participants to start earning awards on absolute basis	18.00%
2017 Performance Program [Member] \| Minimum \| Exceeds 80th Percentile [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total shareholder return for participants to fully earn awards on absolute basis	30.00%