Organization and Principles of Consolidation (Details) - Jun. 30, 2015 subscriptions in Thousands, mi in Thousands, Access_Line_Equivalents in Millions	Access_Line_Equivalents States subscriptions mi
Product Information [Line Items]
Number of operating states | States	17
Communication Services
Product Information [Line Items]
Number of route miles in fiber network, more than	20
Number of access line equivalents | Access_Line_Equivalents	1.1
Number of data subscribers | subscriptions	317
Communication Services | Maine, New Hampshire and Vermont
Product Information [Line Items]
Number of route miles in fiber network, more than	17