Investments (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Schedule of Equity Method Investments [Line Items]
Equity Investments	$ 5,204		$ 5,090
Equity Method Investment, Ownership Percentage	45.00%
Equity Method Investment, Description of Principal Activities	The Company is a member of a joint venture, LB Pipe & Coupling Products, LLC (JV), in which it maintains a 45% ownership interest. The 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	204	176
Proceeds from Equity Method Investment, Dividends or Distributions, Return of Capital	90	378
Capital Leases, Monthly Rent	17
Capital Leases Balloon Payment In Direct Financing Leases	488
Capital Leases, Net Investment in Direct Financing Leases	1,197		1,224
Capital Leased Land [Member]
Schedule of Equity Method Investments [Line Items]
Area of Land	5
Capital Leased Assets, Number of Units	2
Capital Lease Length Of Lease Term	9 years 6 months
Capital Lease Length Of Renewal Term	5 years 6 months
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 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 JV. Accordingly, the Company concluded that the equity method of accounting remains appropriate.
Increase as a result of the amendment [Member]
Schedule of Equity Method Investments [Line Items]
Capital Leases, Monthly Rent	$ 7