Average Share Price

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- Definition

Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not Yet Recognized Maximum Period for Recognition

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- Definition

Expected PRSUs to be Achieved

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No definition available.

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- Definition

Net Proceeds from Issuance of Common Stock

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No definition available.

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- Definition

Grant date fair value of 2011 CEO PRSU

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No definition available.

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- Definition

Grant date fair value of PRSUs granted, 2012

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No definition available.

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- Definition

Stockholders' Equity, Commission Expense on Sale of Stock

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No definition available.

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- Definition

Unrecognized cost of unvested share-based compensation awards.

+ 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 (i)
-URI http://asc.fasb.org/extlink&oid=6415400&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.

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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.

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

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No definition available.

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- Definition

Net number of non-option equity instruments granted to participants.

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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- Definition

Net number of share options (or share units) granted during the period.

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-Name Accounting Standards Codification
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- Definition

Number of new stock issued during the period.

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-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
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-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29, 30
-Article 5

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STOCKHOLDERS' EQUITY AND SHARE-BASED COMPENSATION EXPENSE - Performance-Based Awards Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2011	Nov. 18, 2014	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stockholders' Equity, Commission Expense on Sale of Stock						3.00%
Stock Issued During Period, Shares, New Issues	3,800,000
Restricted stock awards vested, Fair value		$ 6,000	$ 5,900
Requisite service period		4 years
Unrecognized share-based compensation expense		$ 18,400
Average Share Price	$ 12.05
Issuance of common stock in connection with at the market offerings	$ 44,700	44,773
Two Thousand Fifteen CEO Grants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized share-based compensation expense		$ 1,100
2014 Program [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Requisite service period		12 months
Options granted		564,100
Options fair value (in dollars per share)		$ 7.71
Expected grants to be achieved		241,600	251,800
Unrecognized share-based compensation expense		$ 100
2014 Program [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		2 years
2014 Program [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		4 years
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock awards vested, Fair value		$ 2,400	$ 1,600
Unrecognized share-based compensation expense		$ 2,000
Recognition period		4 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value		$ 9.84	$ 6.83
Performance Shares [Member] \| Two Thousand Fifteen CEO Grants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Requisite service period	12 months
Options granted		156,023
Expected grants to be achieved		156,023
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value		$ 12.37
Performance Shares [Member] \| 2011 CEO Grants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Requisite service period		12 months
Options granted		42,000	25,000	60,000	240,000
Options fair value (in dollars per share)		$ 4.67	$ 4.63				$ 6.71
Expected grants to be achieved		27,000
Expected grants to be achieved fair value (in dollars per share)		$ 7.22
Performance Shares [Member] \| 2013 Program [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Requisite service period			12 months
Options granted		104,500	340,000
Options fair value (in dollars per share)			$ 3.84
Expected grants to be achieved		25,000		75,000
Unrecognized share-based compensation expense		$ 100
Performance Shares [Member] \| 2013 Program [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			2 years
Performance Shares [Member] \| 2013 Program [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			4 years
Performance Shares [Member] \| Two Thousand Fifteen Program [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Requisite service period	12 months
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not Yet Recognized Maximum Period for Recognition	3 years
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted	243,000
Expected grants to be achieved		243,000
Unrecognized share-based compensation expense		$ 900
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 11.88