| **Incentive Plans and Stock-Based Compensation - Narrative (Details) - USD ($) $ in Thousands**                                     |           | 3 Months Ended   |        |
|-------------------------------------------------------------------------------------------------------------------------------------|-----------|------------------|--------|
||
| Employee and Non-Employee Stock Options [Member]                                                                                    |      |             |   |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**                                                  |      |             |   |
| Number of shares authorized                                                                                                         | 6,600,000 |             |   |
| Number of years which shares can be granted under the Plan                                                                          | 10 years  |             |   |
| Vesting period                                                                                                                      | 4 years   |             |   |
| Expiration period and term of equity award in years                                                                                 | 10 years  |             |   |
| Unrecognized compensation cost related to share-based arrangements which the Company expects to recognize                           |      | $ 3,301          |   |
| Weighted-average period in years, over which the Company expects to recognize compensation cost related to share-based arrangements |      | 2 years 3 months |   |
| Restricted Stock Units (RSUs) [Member]                                                                                              |      |             |   |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**                                                  |      |             |   |
| Vesting period                                                                                                                      |      | 4 years          |   |
| Unrecognized compensation cost related to share-based arrangements which the Company expects to recognize                           |      | $ 3,865          |   |
| Weighted-average period in years, over which the Company expects to recognize compensation cost related to share-based arrangements |      | 3 years          |   |
| Number of vested and deferred shares                                                                                                |      | 8,058            | 14,520 |
| Restricted Stock Unit Awards with Performance Conditions [Member]                                                                   |      |             |   |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**                                                  |      |             |   |
| Vesting period                                                                                                                      |      | 3 years          |   |
| Unrecognized compensation cost related to share-based arrangements which the Company expects to recognize                           |      | $ 5,688          |   |
| Director [Member] | Restricted Stock Units (RSUs) [Member]                                                                          |      |             |   |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**                                                  |      |             |   |
| Retainer period                                                                                                                     |      | 1 year           |   |
| Time period after grant before sale is allowed                                                                                      |      | 6 months         |   |
| Tranche One [Member] | Employee and Non-Employee Stock Options [Member]                                                             |      |             |   |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**                                                  |      |             |   |
| Annual vesting percentage                                                                                                           | 25.00%    |             |   |
| Tranche Two [Member] | Employee and Non-Employee Stock Options [Member]                                                             |      |             |   |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**                                                  |      |             |   |
| Annual vesting percentage                                                                                                           | 25.00%    |             |   |
| Tranche Three [Member] | Employee and Non-Employee Stock Options [Member]                                                           |      |             |   |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**                                                  |      |             |   |
| Annual vesting percentage                                                                                                           | 25.00%    |             |   |
| Tranche Four [Member] | Employee and Non-Employee Stock Options [Member]                                                            |      |             |   |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**                                                  |      |             |   |
| Annual vesting percentage                                                                                                           | 25.00%    |             |   |

| X                                                                                                                                                                                                                                                                                |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Expiration period and term of equity award in years
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                         |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Number of years which shares can be granted under the Plan
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                       |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The number of restricted stock unit awards (an equity-based payment instrument, excluding stock (or unit) options), which have vested and have been deferred by the employee as of the reporting period.
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                                                                                                 |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Share-based Compensation Arrangement by Share-based Payment Award, Required Period Before Sale
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                                                                           |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Share-based Compensation Arrangement by Share-based Payment Award, Retainer Period
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - 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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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - 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.
+ 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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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - 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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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - 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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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - 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).
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Percentage of vesting of share-based compensation awards.
+ References
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| X                                                                                                                                                          |
|------------------------------------------------------------------------------------------------------------------------------------------------------------|
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| X                                                                                                                                                   |
|-----------------------------------------------------------------------------------------------------------------------------------------------------|
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| X                                                                                                                                                                          |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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| X                                                                                                                                            |
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| X                                                                                                                                                               |
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| X                                                                                                                                                               |
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| X                                                                                                                                                                 |
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| X                                                                                                                                                            |
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