Share based compensation arrangement by share based payment award allocation amounts percentage.

No definition available.

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- Definition

Unrecognized cost of unvested share-based compensation awards.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=109197908&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

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 2
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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

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-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=109197908&loc=d3e5070-113901

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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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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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).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Topic 718
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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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Section 50
-Paragraph 2
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- Definition

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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- Definition

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

+ References

No definition available.

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- Definition

Intrinsic value of equity-based compensation awards vested. Excludes stock and unit options.

+ References

No definition available.

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Stock-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands									12 Months Ended
	Jul. 23, 2018	May 07, 2018	Apr. 30, 2018	Feb. 22, 2018	Feb. 15, 2018	May 30, 2017	Feb. 27, 2017	Mar. 09, 2015	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock based compensation related to all stock-based awards									$ 16,900
Weighted average period, expense to recognize									1 year 8 months 12 days
Intrinsic value of stock option awards exercised									$ 873	$ 4,500	$ 324
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Intrinsic value of restricted stock units vested									17,800	8,800	4,600
Grant date fair value of restricted stock awards granted or assumed									$ 15,800	$ 18,400	$ 21,800
Restricted stock units, granted (shares)									1,131,231
Restricted stock units, vested (shares)									1,102,727
Fair value of awards (in usd per share)									$ 11.05	$ 9.80
Restricted Stock Units (RSUs) [Member] \| Employees and Officers [Member] \| Total Shareholder Return [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units, granted (shares)		4,258		633,107			990,279
Restricted stock units, vesting period				3 years			3 years
Closing stock price on date of grant (in usd per share)		$ 17.61		$ 16.94			$ 12.10
Restricted Stock Units (RSUs) [Member] \| Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units, granted (shares)				184,179			257,851
Restricted Stock Units (RSUs) [Member] \| President [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units, granted (shares)				177,095			247,933
Restricted Stock Units (RSUs) [Member] \| Chief Financial Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units, granted (shares)				85,005			119,008
Restricted stock units, vested (shares)					197,898
Restricted Stock Units (RSUs) [Member] \| Board of Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units, granted (shares)						55,865
Closing stock price on date of grant (in usd per share)						$ 12.53
Restricted Stock Units (RSUs) [Member] \| Board of Directors [Member] \| Total Shareholder Return [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units, granted (shares)	6,677		40,910
Closing stock price on date of grant (in usd per share)	$ 16.37		$ 17.11
Restricted Stock Units (RSUs) [Member] \| Employees, officers and Directors [Member] \| Earnings Per Share [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Closing stock price on date of grant (in usd per share)				$ 16.94			$ 12.10
Fair value of awards (in usd per share)				$ 10.97			$ 6.16
Performance-based RSUs [Member] \| Total Shareholder Return [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocation amount (percent)								33.33%
Performance-based RSUs [Member] \| Earnings Per Share [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocation amount (percent)								33.33%
Performance-based RSUs [Member] \| Stock Price [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocation amount (percent)								33.33%
2013 Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock (shares)									11,727,833
Shares available for future grant (shares)									6,455,011
Minimum [Member] \| Restricted Stock Units (RSUs) [Member] \| Earnings Per Share [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocation amount (percent)				0.00%			0.00%
Maximum [Member] \| Restricted Stock Units (RSUs) [Member] \| Earnings Per Share [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocation amount (percent)				100.00%			100.00%