Related Party Transactions (Other Related Party Transactions) (Narrative) (Details) - USD ($)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Executive Officers [Member] \| Related Customer [Member] \| Employee Leasing Arrangements [Member]
Related Party Transaction [Line Items]
Charges to related party	$ 700,000	$ 600,000	$ 500,000
Due from related party	100,000	100,000
Executive Officers [Member] \| Related Customer [Member] \| Satellite Communication Services [Member]
Related Party Transaction [Line Items]
Revenue from related party	1,000,000	1,300,000	1,200,000
Accounts receivable, related party	500,000	400,000
Immediate Family Member of Management or Principal Owner [Member] \| Property Lease [Member]
Related Party Transaction [Line Items]
Expenses from transactions with related party	$ 48,000	$ 52,000	$ 44,000

For an unclassified balance sheet, amount of receivables arising from transactions with related parties.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

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Reference 8: http://www.xbrl.org/2003/role/presentationRef

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- 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

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Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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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.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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

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