The amount of gain from insurance proceeds received in connection with our property insurance policies.

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Represents the minimum period for which significant portion of the damaged assets have been in service, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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No definition available.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale excluding construction and equipment installations in progress.

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No definition available.

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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- Definition

The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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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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No definition available.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Property and equipment
Property and equipment, gross	$ 49,362	$ 53,740
Less: accumulated depreciation	(26,220)	(29,115)
Property and equipment, net excluding construction and equipment installations in progress	23,142	24,625
Property and equipment, net	24,433	25,501
Depreciation expense	2,900	3,200	$ 3,700
Insurance recoveries	3,250
Land and Land Improvements
Property and equipment
Property and equipment, gross	8,724	8,724
Building
Property and equipment
Property and equipment, gross	11,258	11,579
Equipment
Property and equipment
Property and equipment, gross	27,930	27,953
Towers
Property and equipment
Property and equipment, gross	1,450	5,484
Equipment installations in progress
Property and equipment
Property and equipment, net	1,291	$ 876
WAPA
Property and equipment
Fixed asset impairment charge	$ 500
Minimum period of significant portion of damaged assets have been in service	10 years
Insurance recoveries	$ 3,300