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Acquisitions (Narratives) (Details) - USD ($) |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Oct. 02, 2012 | 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 | Mar. 31, 2013
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired |  |  |  |  |  |  |  |  |  | $ 0 | $ 0 | $ (561,000) |
Sales |  | $ 216,989,000 | $ 223,772,000 | $ 221,245,000 | $ 234,171,000 | $ 239,219,000 | $ 240,429,000 | $ 236,965,000 | $ 235,213,000 | 896,177,000 | 951,826,000 | 959,346,000 |
Net income from continuing operations |  | $ (5,876,000) | $ (36,723,000) | $ 594,000 | $ 9,870,000 | $ 13,054,000 | $ 10,745,000 | $ 3,752,000 | $ 8,479,000 | $ (32,135,000) | $ 36,029,000 | $ 35,937,000 |
AACOA |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of outstanding equity interests acquired | 100.00% |  |  |  |  |  |  |  |  |  |  |  |
Total purchase price | $ 54,100,000 |  |  |  |  |  |  |  |  |  |  |  |
Cash received from seller |  |  |  |  |  |  |  |  |  |  |  |  | $ 600,000
Financing used to fund purchase price from existing credit facility | $ 350,000,000 |  |  |  |  |  |  |  |  |  |  |  |

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