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Investments (Narrative) (Details) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2016 USD ($) a property | Jun. 30, 2015 USD ($) | Jun. 30, 2016 USD ($) a property | Jun. 30, 2015 USD ($) | Dec. 31, 2015 USD ($)
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Equity Investments | $ 4,638 |  | $ 4,638 |  | $ 5,321
Equity in Income/(Loss) of Nonconsolidated Investment | (487) | $ (186) | (683) | $ (13) |
Proceeds from Equity Method Investment, Dividends or Distributions, Return of Capital |  |  | 0 | 90 |
LB Pipe & Coupling Products, LLC [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Equity Investments | $ 4,521 |  | $ 4,521 |  | 5,246
Equity Method Investment, Ownership Percentage | 45.00% |  | 45.00% |  |
Equity Method Investment, Description of Principal Activities |  |  | The Company is a member of a joint venture, LB Pipe & Coupling Products, LLC ("LB Pipe JV"), in which it maintains a 45% ownership interest. LB Pipe JV manufactures, markets, and sells various precision coupling products for the energy, utility, and construction markets and is scheduled to terminate on June 30, 2019. |  |
Equity in Income/(Loss) of Nonconsolidated Investment | $ (476) | $ (186) | $ (725) | $ 3 |
Line of credit, maximum lending capacity | 750 |  | 750 |  |
Due from Joint Ventures, Current | 575 |  | 575 |  |
Other equity investments [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Equity Investments | $ 117 |  | $ 117 |  | $ 75
Capital Leased Land [Member] | LB Pipe & Coupling Products, LLC [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Area of Land | a | 5 |  | 5 |  |
Capital Leased Assets, Number of Units | property | 2 |  | 2 |  |
Capital Lease Length Of Renewal Term |  |  | 5 years 6 months |  |
Capital Leases, Monthly Rent |  |  | $ 17 |  |
Capital Leases Balloon Payment In Direct Financing Leases | $ 488 |  | $ 488 |  |
Variable Interest Entity, Not Primary Beneficiary, Aggregated Disclosure [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Variable Interest Entity, Methodology for Determining Whether Entity is Primary Beneficiary |  |  | Under applicable guidance for variable interest entities in ASC 810, "Consolidation," the Company determined that the LB Pipe JV is a variable interest entity. The Company concluded that it is not the primary beneficiary of the variable interest entity, as the Company does not have a controlling financial interest and does not have the power to direct the activities that most significantly impact the economic performance of the LB Pipe JV. Accordingly, the Company concluded that the equity method of accounting remains appropriate. |  |

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