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Benefit Plans - Asset Allocation for the Pension Plan by Asset Category (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit Plan, Contributions by Employer | $ 0 | $ 0
Defined Benefit Plan, Information about Plan Assets [Abstract] |  |
Actual Plan Asset Allocations | 100.00% | 100.00%
Equity securities |  |
Defined Benefit Plan, Information about Plan Assets [Abstract] |  |
Actual Plan Asset Allocations | 85.00% | 85.00%
Fixed income and cash equivalents |  |
Defined Benefit Plan, Information about Plan Assets [Abstract] |  |
Actual Plan Asset Allocations | 15.00% | 15.00%
S&P 500 Index |  |
Defined Benefit Plan, Information about Plan Assets [Abstract] |  |
Defined Benefit Plan, Expected Return on Plan Assets, Percentage | 7.25% | 7.25%

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- Definition The increase in the fair value of plan assets from contributions made by the employer. + 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 (b)(3) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e2446-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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