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Employee Benefits (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2016 USD ($) Plan h shares | Dec. 31, 2015 USD ($) shares | Dec. 31, 2014 USD ($) shares
Employee Benefits [Abstract] |  |  |
Number of retirement savings plan | Plan | 2 |  |
Employee Stock Ownership Plan ("ESOP") [Member] |  |  |
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items] |  |  |
Maximum annual contribution percentage under ESOP | 4.00% |  |
Contributions to ESOP by employer | $ | $ 1.5 | $ 1.5 | $ 1.5
Number of allocated shares under ESOP (in shares) | shares | 788,308 | 765,630 | 752,710
401(k) Plan [Member] |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Minimum age of employees to participate in plan | 21 years |  |
Minimum requisite service period to participate in retirement plans | 1 year |  |
Minimum annual working hours required to participate in plan | h | 1,000 |  |
Percentage of employee contribution, minimum | 1.00% |  |
Percentage of employee contribution, maximum | 20.00% |  |
Employer matching contribution | 50.00% |  |
Maximum contribution on employees gross pay | 4.00% |  |
Contribution by employer under 401(K) plan | $ | $ 1.0 | $ 1.0 | $ 1.0
Number of allocated shares under 401 (K) plan (in shares) | shares | 482,426 | 515,062 | 503,082

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- Definition Minimum percentage of employees' annual gross pay that the employees contributes to a defined contribution plan. + References No definition available. + Details
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- Definition Percentage of maximum annual contribution made by the employer under Employee Stock Ownership Plan (ESOP) specified as covered employees' gross compensation. + References No definition available. + Details
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- Definition Refers to the Minimum age of employees to participate in retirement savings plans. + References No definition available. + Details
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- Definition This line item represents the minimum number of hours required for employees per annum to participate in plan. + References No definition available. + Details
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- Definition This line item represents the minimum service period of employees required to participate in retirement plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition The shares or units in 401(K) Plan that have been assigned to individual participant accounts based on a known formula. IRS rules require allocations to be nondiscriminatory generally based on compensation, length of service, or a combination of both. For any particular participant such shares or units may be vested, unvested, or partially vested. + References No definition available. + Details
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- Definition This line item represents the number of components in contributory retirement savings plan maintained by the entity. + References No definition available. + 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=49170846&loc=d3e28014-114942 + Details
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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. + Details
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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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- Definition Percentage employer matches of the employee's percentage contribution matched. + 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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- Definition This item represents the amount of cash contributions during the period made by the entity to the Employee Stock Ownership Plan (ESOP). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=65895303&loc=d3e17540-113929 + Details
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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. + Details
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- Definition The shares or units in an ESOP trust that have been assigned to individual participant accounts based on a known formula. IRS rules require allocations to be nondiscriminatory generally based on compensation, length of service, or a combination of both. For any particular participant such shares or units may be vested, unvested, or partially vested. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=65895303&loc=d3e17540-113929 + Details
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