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Employee Benefit Plans (Details) - 401(K) [Member] - USD ($) | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Defined Contribution Plan Disclosure [Line Items] |  |  |
Company's matching percentage of employees' contribution | 40.00% | 40.00% | 40.00%
Company's matching contribution of employees' salary | 5.00% | 5.00% | 5.00%
Company's total contributions | $ 750,000 | $ 573,000 | $ 553,000
Discretionary contributions | $ 0 | $ 0 | $ 0

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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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