Equity-Based Compensation - Summary of Status of Equity-Based Compensation Plans (Details 4)	Dec. 31, 2014
2014 Plan [Member]
Summary of Status of Equity-Based Compensation Plans
Awards originally available	1,500,000
Awards available for grant	1,457,700
2009 Plan [Member]
Summary of Status of Equity-Based Compensation Plans
Awards originally available	3,400,000
Awards available for grant	1,616,398
2004 Plan [Member]
Summary of Status of Equity-Based Compensation Plans
Awards originally available	6,500,000
Stock options outstanding	5,200
Options exercisable	5,200
Awards available for grant	106,423
2001 Plan [Member]
Summary of Status of Equity-Based Compensation Plans
Awards originally available	2,000,000
RSUs [Member] \| 2014 Plan [Member]
Summary of Status of Equity-Based Compensation Plans
RSU's outstanding	42,300
RSUs [Member] \| 2009 Plan [Member]
Summary of Status of Equity-Based Compensation Plans
RSU's outstanding	374,442
RSUs [Member] \| 2004 Plan [Member]
Summary of Status of Equity-Based Compensation Plans
RSU's outstanding	101,223

Share based compensation arrangement by share based payment award number of shares originally available.

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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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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

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option 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)(1)(iii)

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- Definition

Number of options outstanding, including both vested and non-vested options.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

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

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

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