Fair value period used for revaluation.

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Share based compensation arrangement by share based payment award discount on market price of common stock percentage.

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No definition available.

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Share based payment award equity instruments other than options grants in period aggregate intrinsic value.

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- Definition

Share based compensation arrangement by share based payment award maximum employee subscription value

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- Definition

Share-based compensation arrangement by share-based payment award maximum percentage of earnings on employee base salaries.

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No definition available.

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Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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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.

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- Definition

Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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- Definition

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

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- Definition

Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

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- Definition

Amount of liabilities classified as other, due after one year or the normal operating cycle, if longer.

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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).

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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.

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No definition available.

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- Definition

The highest percentage of annual salary that an employee is permitted to utilize with respect to the plan.

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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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- 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.

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Stock-Based Compensation - Additional Information (Detail) - USD ($)		3 Months Ended
	Apr. 20, 2016	Mar. 31, 2019	Mar. 31, 2018	Jan. 31, 2019	Dec. 31, 2018	Jan. 31, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense		$ 2,082,000	$ 1,707,000
Stock-based compensation, capitalized		336,000	159,000
Unrecognized compensation costs for all share-based payment arrangements		9,275,000
Accrued liabilities		40,570,000			$ 35,735,000
Other non-current liabilities		$ 10,065,000			$ 2,600,000
Common stock, shares issued		79,568,496			79,008,243
Time-Based Stock Appreciation Rights [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense		$ 36,000	$ 60,000
Unrecognized compensation costs for all share-based payment arrangements		146,000
Intrinsic value of SARs		$ 18,000
Number of shares, granted		0	0
Performance-Based Stock Appreciation Rights [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense		$ 0	$ 0
Unrecognized compensation costs for all share-based payment arrangements		0
Intrinsic value of SARs		$ 0
Number of shares, granted		0	0
Time-Based Restricted Stock Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense		$ 870,000	$ 949,000
Unrecognized compensation costs for all share-based payment arrangements		$ 5,825,000
Number of shares, granted		109,250
Performance-Based Restricted Stock Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense		$ 1,053,000	503,000
Unrecognized compensation costs for all share-based payment arrangements		3,304,000
Market Performance Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense		$ 61,000	123,000
Maximum percentage of MPUs for senior executives		15.00%
Fair value period of MPUs		3 years
Term of MPUs		3 years
Accrued liabilities		$ 118,000			$ 527,000
Other non-current liabilities		$ 54,000			$ 131,000
Common stock, shares issued				60,885		81,277
2016 LTIP [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares available for grant		2,950,708
ESPP [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense		$ 62,000	$ 72,000
Number of shares authorized under the plan	5,000,000
Maximum percentage deductible from employees' gross pay	10.00%
Maximum amount deductible from employees gross pay	$ 25,000
ESPP [Member] \| Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Maximum percentage of discount on common stock's fair market value	15.00%