Employee Benefit Plans (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Deferred Compensation Plan [Line Items]
Percent company total match on employee deferred compensation plan contributions, maximum (in hundredths)	4.00%
Matching contributions - deferred compensation plan	$ 194	$ 218	$ 233
Savings and Retirement 401K [Member]
Defined Contribution Plan Disclosure [Line Items]
Eligible employees' maximum allowable contribution as a percentage of compensation (in hundredths)	75.00%
Percentage company total match on employee contributions, maximum (in hundredths)	4.00%
Company match on the first three percent of compensation deferred (in hundredths)	100.00%
Company match on deferrals between three percent and five percent of compensation (in hundredths)	50.00%
Compensation deferred percentage eligible for one hundred percent match on employees' contributions (in hundredths)	3.00%
Compensation deferred percentage eligible for fifty percent match on employee contributions (in hundredths)	5.00%
Matching contributions -defined contribution plans	$ 5,817	$ 5,583	$ 5,235

The company match on deferrals between three percent and five percent of compensation.

No definition available.

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- Definition

The company match on the first three percent of compensation deferred.

+ References

No definition available.

+ Details

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- Definition

The description of the eligibility criteria for a fifty percent match on employees' contributions by the company.

+ References

No definition available.

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- Definition

The description of the eligibility criteria for a hundred percent match on employee contributions by the company.

+ References

No definition available.

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- Definition

The maximum allowable contribution to the pension plan as a percentage of the employees' compensation, subject to the federal dollar limit.

+ References

No definition available.

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- Definition

Percent Company total match on employee contributions Deferred Comp Plan in hundreths

+ References

No definition available.

+ Details

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- Definition

The maximum match by the company on employee contributions to the pension plan as a percentage of the employees' compensation.

+ References

No definition available.

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- Definition

The amount of payment into the fund established for purposes of making future disbursements to the individual in accordance with the terms and understanding of the deferred compensation arrangement.

+ References

No definition available.

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- 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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- 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

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- 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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