v3.8.0.1

STOCK-BASED COMPENSATION - Restricted Stock Units (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Restricted Stock Units, Weighted Average Grant Date Fair Value [Abstract]
Aggregate grant date fair value		$ 100		$ 3,000
Payment for shares withheld for tax withholdings on vesting of restricted stock units	$ (600)	$ (400)	$ (1,070)	$ (941)
PBRSU to common stock, conversion ratio	100.00%		100.00%
Market-Based Restricted Stock Unit, Conversion Ratio	100.00%		100.00%
Common Stock
Restricted Stock Units, Weighted Average Grant Date Fair Value [Abstract]
Shares repurchased for tax withholdings on vesting of RSUs	180,345	60,638	275,922	156,186
2014 Equity Incentive Plan
Restricted Stock Units, Number of Shares [Roll Forward]
Awards granted			3,287,665
Awards canceled			(1,595,966)
Restricted Stock Units (RSUs)
Restricted Stock Units, Number of Shares [Roll Forward]
Beginning balance			4,365,670
Awards granted			3,287,665
Awards vested			(1,453,616)
Awards canceled			(1,320,044)
Ending balance	4,879,675		4,879,675
Restricted Stock Units (RSUs) | 2014 Equity Incentive Plan
Restricted Stock Units, Weighted Average Grant Date Fair Value [Abstract]
Beginning balance (in dollars per share)			$ 6.23
Awards granted (in dollars per share)	$ 4.66	$ 6.09	4.96	$ 6.23
Awards vested (in dollars per share)			5.92
Awards canceled (in dollars per share)			6.14
Ending balance (in dollars per share)	$ 5.49		$ 5.49
Aggregate grant date fair value	$ 400	$ 1,000	$ 16,300	$ 19,900
Fair value of shares vested	$ 1,700	$ 4,100	$ 6,300	$ 10,000
Restricted Stock Units (RSUs) | Vesting period, one year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			1 year
Restricted Stock Units (RSUs) | Vesting period, three years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			3 years
PBRSUs
Restricted Stock Units, Number of Shares [Roll Forward]
Awards granted			378,644
Market-Based Restricted Stock Unit [Member]
Restricted Stock Units, Number of Shares [Roll Forward]
Awards granted			358,000
Restricted Stock Units, Weighted Average Grant Date Fair Value [Abstract]
Awards granted (in dollars per share)			$ 4.18

X

- Definition

Market-Based Restricted Stock Unit, Conversion Ratio

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Performance-Based Restricted Stock Unit, Conversion Ratio

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- Definition

Amount of cash outflow to satisfy an employee's income tax withholding obligation as part of a net-share settlement of a share-based award.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (a)
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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

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)
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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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-Subparagraph (c)(1)(iv)(3)
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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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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

The weighted average fair value at grant date for nonvested equity-based awards issued 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

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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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.

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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-Publisher FASB
-Name Accounting Standards Codification
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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.

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-Name Accounting Standards Codification
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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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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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- Definition

For net-share settlement of share-based awards when the employer settles employees' income tax withholding obligations, this element represents the number of shares the employees use to repay the employer.

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- Definition

Value, before forfeitures, of stock or other type of equity granted of any equity-based compensation plan other than an employee stock ownership plan (ESOP).

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