Number of Officers

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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

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)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

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

+ 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 (c)(1)(iv)(3)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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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.

+ 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 (c)(2)(iii)(3)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-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=6415400&loc=d3e5070-113901

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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).

+ 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 (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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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
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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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.

+ References

No definition available.

+ Details

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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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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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.

+ References

No definition available.

+ Details

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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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(2)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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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.

+ 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 (c)(2)(iii)(2)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

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

+ References

No definition available.

+ Details

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Stock-Based Compensation - Nonvested Stock Activity (Details)	6 Months Ended
	Jun. 30, 2017 $ / shares shares	Mar. 30, 2017 executive_officer	Dec. 31, 2016 $ / shares
Employees [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Granted (in shares)	320,000
Director [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Granted (in shares)	125,566
2008 Equity Incentive Plan [Member] \| Employees [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Stock options vesting period	3 years
2008 Equity Incentive Plan [Member] \| Director [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Stock options vesting period	1 year
Restricted Stock [Member] \| Director [Member]
Summary of nonvested stock awards activity
Granted (in shares)	29,920
Restricted Stock [Member] \| 2008 Equity Incentive Plan [Member] \| Employees [Member]
Summary of nonvested stock awards activity
Granted (in shares)	310,139
Restricted Stock [Member] \| 2008 Equity Incentive Plan [Member] \| Director [Member]
Summary of nonvested stock awards activity
Granted (in shares)	41,000
Performance Shares [Member] \| 2008 Equity Incentive Plan [Member] \| Employees [Member]
Summary of nonvested stock awards activity
Granted (in shares)	274,800
Performance Shares [Member] \| 2008 Equity Incentive Plan [Member] \| Director [Member]
Summary of nonvested stock awards activity
Granted (in shares)	59,000
Restricted Stock Units (RSUs) [Member] \| Director [Member]
Summary of nonvested stock awards activity
Granted (in shares)	21,259
Restricted Stock Units (RSUs) [Member] \| 2008 Equity Incentive Plan [Member] \| Employees [Member]
Summary of nonvested stock awards activity
Granted (in shares)	56,812
Restricted Stock Units (RSUs) [Member] \| 2008 Equity Incentive Plan [Member] \| Senior Business Leader [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Number of officers \| executive_officer		6
Employee Stock Option [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Granted (in shares)	445,566
Restricted Stock and Restricted Stock Units [Member]
Summary of nonvested stock awards activity
Nonvested at January 1, 2017 (in shares)	3,893,050
Granted (in shares)	792,930
Vested (in shares)	28,334
Forfeited (in shares)	2,364,728
Nonvested at June 30, 2017 (in shares)	2,292,918
Summary of nonvested stock awards activity, weighted average grant date fair value
Nonvested at January 1, 2017 (in dollars per share) \| $ / shares	$ 5.36		$ 4.37
Granted (in dollars per share) \| $ / shares	6.32
Vested (in dollars per share) \| $ / shares	6.36
Forfeited (in dollars per share) \| $ / shares	4.03
Nonvested at June 30, 2017 (in dollars per share) \| $ / shares	$ 5.36
Restricted Stock and Restricted Stock Units [Member] \| Employees [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Stock options vesting period	3 years
Restricted Stock and Restricted Stock Units [Member] \| Director [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Stock options vesting period	1 year