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Quarterly Financial Information (Unaudited) (Tables) (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Quarterly Financial Information (Unaudited) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 139,138 | [1] | $ 176,059 | [2] | $ 171,419 | $ 137,907 | $ 161,149 | [3] | $ 167,797 | $ 166,832 | [4] | $ 111,414 | $ 537,214 |  | $ 561,899 |  | $ 559,846 |
Gross profit | 29,872 | [1] | 36,038 | [2] | 37,089 | 30,653 | 31,605 | [3] | 35,159 | 30,700 | [4] | 24,127 | 133,653 |  | 121,591 |  | 115,939 |
Net (loss) income | $ 3,328 | [1] | $ (57,422) | [2] | $ 5,362 | $ 4,285 | $ 6,029 | [3] | $ 9,116 | $ 6,862 | [4] | $ 3,649 | $ (44,445) |  | $ 25,656 |  | $ 29,290 |
Basic (loss) earnings per common share | $ 0.33 | [1] | $ (5.60) | [2] | $ 0.52 | $ 0.42 | $ 0.59 | [3] | $ 0.89 | $ 0.67 | [4] | $ 0.36 | $ (4.33) |  | $ 2.51 |  | $ 2.88 |
Diluted (loss) earnings per common share | 0.32 | [1] | (5.60) | [2] | 0.52 | 0.41 | 0.58 | [3] | 0.88 | 0.67 | [4] | 0.35 | (4.33) |  | 2.48 |  | 2.85 |
Dividends paid per common share | $ 0.04 | [1] | $ 0.04 | [2] | $ 0.04 | $ 0.04 | $ 0.04 | [3] | $ 0.03 | $ 0.03 | [4] | $ 0.03 | $ 0.16 |  | $ 0.13 |  | $ 0.12 |
Goodwill, Impairment Loss |  |  | $ 80,337 |  |  |  |  |  |  |  |  |  | $ 80,337 |  | $ 0 |  | $ 0 |
Goodwill, Impairment Loss, Net of Tax |  |  | $ 63,887 |  |  |  |  |  |  |  |  |  | 63,887 |  |  |  |  |
Pre-tax gain on sale of facility | $ 2,279 |  |  |  |  |  |  |  |  |  |  |  | $ 2,279 | [5] | $ 0 | [5] | $ 0 | [5]
Product Warranty Expense |  |  |  |  |  |  | $ 4,766 |  |  | $ 4,000 |  |  |  |  |  |  |  |
[1] | Fourth quarter 2015 includes $2,279 pre-tax gain on sale of Tucson, AZ concrete tie facility.
[2] | Third quarter 2015 includes $80,337 ($63,887 net of tax) impairment of goodwill related to the IOS and Chemtec reporting units.
[3] | Fourth quarter 2014 includes a $4,766 warranty charge related to UPRR warranty claim.
[4] | Second quarter 2014 includes a $4,000 warranty charge related to UPRR warranty claim.
[5] | On December 23, 2015, the Company sold certain assets related to the former Tucson, AZ precast concrete tie facility for $2,750 resulting in a pre-tax gain on sale of $2,279.

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