Employee Benefit Plans (Details) - USD ($)	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
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	$ 800,000	$ 800,000	$ 1,000,000

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.

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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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- Definition

Employee Benefit Plans (Textual) [Abstract]

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No definition available.

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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=49170846&loc=d3e28014-114942

+ Details

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- Definition

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

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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.

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No definition available.

+ Details

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- Definition

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

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No definition available.

+ Details

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