Property and equipment:	3 Months Ended
Property and equipment:	Mar. 31, 2013
Property and equipment:
Property and equipment:	2. Property and equipment: Depreciation and amortization expense related to property and equipment and capital leases was $15.8 million and $15.2 million for the three months ended March 31, 2013 and 2012, respectively. The Company capitalized salaries and related benefits of employees working directly on the construction and build-out of its network of $1.9 million and $1.7 million for the three months ended March 31, 2013 and 2012, respectively.

The entire disclosure for long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. This disclosure may include property plant and equipment accounting policies and methodology, a schedule of property, plant and equipment gross, additions, deletions, transfers and other changes, depreciation, depletion and amortization expense, net, accumulated depreciation, depletion and amortization expense and useful lives, income statement disclosures, assets held for sale and public utility disclosures.

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