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

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

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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

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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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.

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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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- Definition

Per share or per unit amount of equity securities issued.

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No definition available.

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- Definition

Number of shares issued during the period as a result of an employee stock purchase plan.

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Stock-based Compensation - Additional Information (Detail) - USD ($)		3 Months Ended		6 Months Ended
	Apr. 20, 2016	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016	Feb. 17, 2016
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense		$ 1,445,000	$ 1,219,000	$ 2,969,000	$ 2,605,000
Stock-based compensation, capitalized		112,000	65,000	243,000	131,000
Unrecognized compensation costs for all share-based payment arrangements		3,796,000		3,796,000
Accrued expenses		37,210,000		37,210,000		$ 30,431,000
Other non-current liabilities		11,944,000		11,944,000		3,684,000
Time-Based Stock Appreciation Rights [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense		141,000	71,000	295,000	$ 165,000
Unrecognized compensation costs for all share-based payment arrangements		604,000		604,000
Intrinsic value of SARs		895,000		$ 895,000
Number of shares, granted				90,000	0
Performance-Based Stock Appreciation Rights [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense					$ 2,000
Unrecognized compensation costs for all share-based payment arrangements		0		$ 0
Intrinsic value of SARs		243,000		243,000
Number of shares, granted					0
Time-Based Restricted Stock Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense		679,000	588,000	1,379,000	$ 1,150,000
Unrecognized compensation costs for all share-based payment arrangements		2,126,000		$ 2,126,000
Number of shares, granted				47,370
Performance-Based Restricted Stock Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense		302,000	354,000	$ 742,000	879,000
Unrecognized compensation costs for all share-based payment arrangements		1,066,000		1,066,000
Performance Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense		$ 250,000	$ 194,000	$ 434,000	$ 397,000
Maximum percentage of MPUs for senior executives		15.00%		15.00%
Fair value period of MPUs				3 years
Accrued expenses		$ 525,000		$ 525,000		715,000
Other non-current liabilities		$ 169,000		$ 169,000		$ 260,000
Market Performance Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Term of MPUs				3 years
2016 LTIP [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares authorized under the plan	6,949,400
Number of shares available for grant		6,321,694		6,321,694
2006 LTIP [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares authorized under the plan							1,949,400
ESPP [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares authorized under the plan	5,000,000
Stock-based compensation expense		$ 73,000		$ 119,000
Maximum percentage deductible from employees' gross pay	10.00%
Maximum amount deductible from employees gross pay	$ 25,000
Issuance of common stock under employees stock purchase plan, shares				75,888
Share price		$ 6.97		$ 6.97
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%