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Business Segments (Reconciliation of Operating Profit (Loss) from Segments to Consolidated) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Segment Reporting Information |  |
Interest expense | $ (1,958) | $ (2,108)
Interest income | 71 | 56
Other income (expense) | 608 | (5)
Equity in loss of nonconsolidated investments | (3) | (200)
Loss before income taxes | (1,497) | (1,991)
Operating Segments |  |
Segment Reporting Information |  |
Profit for reportable segments | 3,951 | 1,809
Segment Reconciling Items |  |
Segment Reporting Information |  |
Interest expense | (1,958) | (2,108)
Interest income | 71 | 56
Other income (expense) | 608 | (5)
LIFO (expense) income | (164) | 11
Equity in loss of nonconsolidated investments | (3) | (200)
Unallocated corporate assets |  |
Segment Reporting Information |  |
Unallocated corporate expense and other unallocated charges | $ (4,002) | $ (1,554)

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