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Employee Benefit Plan (Tables) | 12 Months Ended
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Dec. 31, 2016
Employee Benefit Plans [Abstract] |
Unrealized Gains (Losses) on Investments held in Rabbi Trust |
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﻿ |  |  |  | Year ended December 31,
﻿ |  |  |  | 2016 |  | 2015 |  | 2014
﻿Unrealized gains (losses) on investments held in rabbi trust |  |  |  | $ | 586 |  | $ | (571) |  | $ | 184
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- Definition Tabular disclosure of unrealized gains and losses on investments. + References No definition available. + Details
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