Deferred Compensation Plan (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
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| Deferred Compensation Plans Disclosure [Abstract] | ||
| Minimum period of participation before distributions are made | 5 years | |
| Cash surrender value due policyholders, amount | $ 12,711 | $ 10,210 |
| Deferred compensation liability | $ 18,161 | $ 17,247 |
| X | ||||||||||
- References No definition available.
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- Definition Minimum Period of Participation in the Plan Before Distributions are Made No definition available.
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| X | ||||||||||
- Definition Amount of the entity's obligations under long-duration contracts with respect to cash it must pay to policyholders upon their terminating, or surrendering, their insurance contracts. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements payable within one year (or the operating cycle, if longer). Represents currently earned compensation under compensation arrangements that is not actually paid until a later date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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