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Employee Benefit Plans (Tables) | 12 Months Ended
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Dec. 31, 2016
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract] |
Matching contributions [Table Text Block] | The table below sets forth our matching contributions for the past three years (in thousands):
|  | 2016 |  | 2015 |  | 2014
Matching contributions - defined contribution plans |  | $ | 5,817 |  |  | $ | 5,583 |  |  | $ | 5,235 |
Matching contributions - deferred compensation plan |  | 194 |  |  | 218 |  |  | 233 |

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- Definition Tabular disclosure of matching contributions to the pension plan and deferred compensation plan. + References No definition available. + Details
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- References No definition available. + Details
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