Stock-Based Compensation (Details 3) (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Summary of non-vested stock options
Shares Forfeited		(105,126)
Restricted Stock Service Based [Member]
Summary of non-vested stock options
Non-vested Shares, Beginning Balance	464,000
Shares Granted	212,000	206,842
Shares Vested	(51,000)
Shares Forfeited	(56,000)
Non-vested Shares, Ending Balance	569,000	464,000
Weighted average fair value, Beginning Balance	$ 9.43
Weighted average fair value, Granted	$ 23.30	$ 9.66
Weighted average fair value, Vested	$ 10.43
Weighted average fair value, Forfeited	$ 14.29
Weighted average fair value, Ending Balance	$ 14.03	$ 9.43
Restricted Stock Performance Based [Member]
Summary of non-vested stock options
Non-vested Shares, Beginning Balance	100,000
Shares Granted	0
Shares Vested	0
Shares Forfeited	(3,000)
Non-vested Shares, Ending Balance	97,000
Weighted average fair value, Beginning Balance	$ 13.24
Weighted average fair value, Granted	$ 0.00
Weighted average fair value, Vested	$ 0.00
Weighted average fair value, Forfeited	$ 13.24
Weighted average fair value, Ending Balance	$ 13.24
Restricted Stock Units Service Based [Member]
Summary of non-vested stock options
Non-vested Shares, Beginning Balance	86,000
Shares Granted	28,000	54,166
Shares Vested	(31,000)
Shares Forfeited	(12,000)
Non-vested Shares, Ending Balance	71,000	86,000
Weighted average fair value, Beginning Balance	$ 10.79
Weighted average fair value, Granted	$ 25.36	$ 10.04
Weighted average fair value, Vested	$ 10.61
Weighted average fair value, Forfeited	$ 12.96
Weighted average fair value, Ending Balance	$ 16.28	$ 10.79
Restricted Stock Units Performance Based [Member]
Summary of non-vested stock options
Non-vested Shares, Beginning Balance	100,000
Shares Granted	0
Shares Vested	0
Shares Forfeited	(3,000)
Non-vested Shares, Ending Balance	97,000
Weighted average fair value, Beginning Balance	$ 0.00
Weighted average fair value, Granted	$ 0.00
Weighted average fair value, Vested	$ 0.00
Weighted average fair value, Forfeited	$ 0.00
Weighted average fair value, Ending Balance	$ 0.00

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

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)

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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

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-Topic 718

-SubTopic 10

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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)

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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)

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- Definition

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

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

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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

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-Publisher FASB

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-SubTopic 10

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-Subparagraph (c)(2)(iii)(2)

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