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Long Term Debt (Narrative) (Details) (USD $) | Sep. 30, 2014 | Dec. 31, 2013 | Sep. 30, 2014 Bank revolving credit facility Amended and Restated Revolving Credit Agreement | Sep. 30, 2014 Standby Letters of Credit Bank revolving credit facility Amended and Restated Revolving Credit Agreement | May 13, 2014 Specialized Industries LP Revolving Credit Facility Amended and Restated Revolving Credit Agreement | May 12, 2014 Specialized Industries LP Revolving Credit Facility Amended and Restated Revolving Credit Agreement
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Debt Instrument [Line Items] |  |  |  |  |  |
Amount of line of credit |  |  |  |  | $ 250,000,000 | $ 100,000,000
Aggregate Commitments |  |  | 250,000,000 |  |  |
Maximum amount of additional aggregate commitments (Up to $50,000,000) |  |  | 50,000,000 |  |  |
Total debt | 190,857,000 | 428,000 | 190,000,000 |  |  |
Amount of capacity |  |  |  | 685,000 |  |
Available borrowings |  |  | $ 59,315,000 |  |  |

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