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Debt (Narrative) (Details) - USD ($) | Jun. 30, 2015 | Dec. 31, 2014 | May. 13, 2014 | May. 12, 2014
--- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |
Total debt | $ 203,542,000 | $ 190,575,000 |  |
Amended and Restated Revolving Credit Agreement | Bank revolving credit facility |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Aggregate commitments | 250,000,000 |  |  |
Maximum amount of additional aggregate commitments (Up to $50,000,000) | 50,000,000 |  |  |
Total debt | 203,000,000 |  |  |
Available borrowings | 45,200,000 |  |  |
Amended and Restated Revolving Credit Agreement | Standby Letters of Credit | Bank revolving credit facility |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Amount of capacity | $ 1,800,000 |  |  |
Amended and Restated Revolving Credit Agreement | Specialized Industries LP | Revolving Credit Facility |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Amount of line of credit |  |  | $ 250,000,000 | $ 100,000,000

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