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Employee Benefit Plans (Schedule of Discount and Compensation Rates) (Details) | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Pension Benefit Plan [Member] |  |  |
Weighted Average Assumptions: |  |  |
Expected Return on Plan Assets | 7.50% | 7.50% | 7.50%
Discount Rate for: |  |  |
Benefit Obligation | 4.06% | 4.26% | 3.91%
Benefit Cost | 4.26% | 3.91% | 4.87%
Compensation Increase for: |  |  |
Benefit Obligation | 3.00% | 3.00% | 3.00%
Benefit Cost | 3.00% | 3.00% | 3.00%
Other Benefits Plan [Member] |  |  |
Weighted Average Assumptions: |  |  |
Expected Return on Plan Assets | 7.50% | 7.50% | 7.50%
Discount Rate for: |  |  |
Benefit Obligation | 4.06% | 4.26% | 3.91%
Benefit Cost | 4.26% | 3.91% | 4.87%
Compensation Increase for: |  |  |
Benefit Obligation | 3.00% | 3.00% | 3.00%
Benefit Cost | 3.00% | 3.00% | 3.00%

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- Definition The interest rate used to adjust for the time value of money for the plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(1) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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- Definition Expected rate of compensation increases (for pay-related plans). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(2) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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- Definition An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Expected Long-Term Rate of Return on Plan Assets -URI http://asc.fasb.org/extlink&oid=6512046 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(3) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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- Definition Expected rate of compensation increases (for pay-related plans). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(2) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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