Employee Benefit Plans (Details) (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Employee Benefit Plans [Abstract]
Defined contribution plan funded percentage	50.00%
Percentage of annual compensation per employee	6.00%
Defined contribution plan contributions by employer	$ 3,000
Defined contribution plan employers matching contribution annual vesting percentage after three years	100.00%
Period of defined contribution plan employers matching contribution annual vesting 100 percentage	3 years
Defined contribution plan employers matching contribution annual vesting percentage	20.00%
Defined contribution plan employers matching contribution annual vesting period	2 years
Defined contribution plan, employer contributions	$ 1,000,000	$ 1,100,000	$ 1,100,000

Defined contribution plan employee contribution percentage of employee compensation maximum.

No definition available.

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- Definition

Defined contribution plan employers matching contribution annual vesting percentage one.

+ References

No definition available.

+ Details

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- Definition

Defined contribution plan employers matching contribution annual vesting period.

+ References

No definition available.

+ Details

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- Definition

Defined contribution plan employers matching contribution annual vesting period one.

+ References

No definition available.

+ Details

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- Details

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- Definition

The amount of the cost recognized during the period for defined contribution plans.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 70

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942

+ Details

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- Definition

Amount of discretionary contributions made by an employer to a defined contribution plan.

+ References

No definition available.

+ Details

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- Definition

Percentage of employer's matching contributions to a defined contribution plan that vests in a given year.

+ References

No definition available.

+ Details

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- Definition

Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.

+ References

No definition available.

+ Details

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