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Business Segments (Reconciliation of Operating Profit (Loss) from Segments to Consolidated) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012
Business Segments [Abstract] |  |  |  |
Income for reportable segments | $ 13,553 | $ 14,770 | $ 35,261 | $ 17,306
Interest expense | (118) | (141) | (376) | (405)
Interest income | 149 | 126 | 494 | 319
Other (expense)/income | 638 | (612) | 953 | (4)
LIFO income/(expense) | 553 | 432 | 299 | 333
Equity in income of nonconsolidated investment | 296 | 310 | 892 | 643
Corporate expense, cost of capital elimination and other unallocated charges | (1,049) | (1,774) | (4,962) | (5,178)
Income (loss) from continuing operations, before income taxes | $ 14,022 | $ 13,111 | $ 32,561 | $ 13,014

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