This element represents a statement of which of the assets, liabilities, equity interests, recognized in the financial statements or items of consideration transferred for which the initial accounting is incomplete in connection with a business combination occurring during the period.

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This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the cost method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment.

+ References+ Details

- Definition

For an unclassified balance sheet, amounts due from related parties other than affiliates, employees, joint ventures, officers or stockholders.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(k)(1))

-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 850

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph k

-Subparagraph 1

-Article 4

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 57

-Paragraph 2

-Subparagraph d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 3

-Article 7

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.3)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Interpretation (FIN)

-Number 46R

-Paragraph 16, 17

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment.

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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- Definition

Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

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Acquisitions and Other Investments (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Business Acquisition [Line Items]
Business combination, provisional information, initial accounting incomplete, items			As of June 30, 2013, the allocations of purchase prices to the fair values of tangible and intangible assets and liabilities, including the estimated values of contingent earn-out obligations and the estimated useful lives of acquired assets for these acquisitions, are provisional and remain preliminary as management continues to assess the valuation of these items and any ultimate purchase price adjustments that may result based on the final net assets and net working capital of the acquired businesses, as prescribed in the corresponding purchase agreements.
Asset impairment charges, cost method investments	$ 0	$ 0	$ 0	$ 0
Asset impairment charges, equity method investments	0	0	0	0
Segment, Discontinued Operations [Member] \| Panama Subsidiary [Member]
Business Acquisition [Line Items]
Less than wholly owned subsidiary, ownership percentage	60.00%		60.00%
Segment, Discontinued Operations [Member] \| Panama Subsidiary [Member] \| Rock Extraction Business [Member]
Business Acquisition [Line Items]
Equity method investment, ownership percentage	34.00%		34.00%
Related party revenues	0	400,000	0	1,200,000
Related party receivables, equity method investee	$ 3,700,000		$ 3,700,000		$ 3,700,000
Segment, Discontinued Operations [Member] \| Beneficial Owner [Member] \| Rock Extraction Business [Member]
Business Acquisition [Line Items]
Equity method investment, ownership percentage	20.40%		20.40%
Ec Source Services Llc [Member] \| Earn-out Arrangements [Member]
Business Acquisition [Line Items]
Change in range of outcomes, contingent consideration, reasons			the Company remeasured the contingent consideration liability for EC Source Services LLC ("EC Source") using currently available facts and circumstances, including recent and expected future performance
Optima Network Services Inc [Member] \| Earn-out Arrangements [Member]
Business Acquisition [Line Items]
Change in range of outcomes, contingent consideration, reasons			the contingent consideration liability for Optima Network Services, Inc. ("Optima") was remeasured and settled in full during the first quarter of 2013 as a result of an amendment to the Optima purchase agreement effective February 28, 2013