Nature Of Operations And Critical Accounting Policies And Estimates (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Significant Accounting Policies [Line Items]
Cost adjustment period	2 years
Advertising and promotional expenses	$ 1.1	$ 1.0	$ 1.1
Company's Revenues [Member]
Significant Accounting Policies [Line Items]
Percentage of regulatory revenue	5.00%	8.00%	11.00%
Minimum [Member]
Significant Accounting Policies [Line Items]
Estimated useful life	3 years
Minimum [Member] | Support Equipment [Member]
Significant Accounting Policies [Line Items]
Property, plant and equipment estimated useful life	3 years
Minimum [Member] | Communication And Network Equipment [Member]
Significant Accounting Policies [Line Items]
Property, plant and equipment estimated useful life	10 years
Minimum [Member] | Internet Equipment [Member]
Significant Accounting Policies [Line Items]
Property, plant and equipment estimated useful life	3 years
Minimum [Member] | Buildings And Other Support Equipment [Member]
Significant Accounting Policies [Line Items]
Property, plant and equipment estimated useful life	14 years
Maximum [Member]
Significant Accounting Policies [Line Items]
Estimated useful life	15 years
Cash balance amount insured by FDIC	$ 0.25
Maximum [Member] | Support Equipment [Member]
Significant Accounting Policies [Line Items]
Property, plant and equipment estimated useful life	19 years
Maximum [Member] | Communication And Network Equipment [Member]
Significant Accounting Policies [Line Items]
Property, plant and equipment estimated useful life	15 years
Maximum [Member] | Internet Equipment [Member]
Significant Accounting Policies [Line Items]
Property, plant and equipment estimated useful life	5 years
Maximum [Member] | Buildings And Other Support Equipment [Member]
Significant Accounting Policies [Line Items]
Property, plant and equipment estimated useful life	50 years
Customer Relationships [Member]
Significant Accounting Policies [Line Items]
Estimated useful life	8 years	8 years
Seat Licenses [Member]
Significant Accounting Policies [Line Items]
Estimated useful life	5 years
Restricted Stock [Member]
Significant Accounting Policies [Line Items]
Vesting period	3 years
Restricted Stock [Member] | Minimum [Member]
Significant Accounting Policies [Line Items]
Vesting period	2 years
Restricted Stock [Member] | Maximum [Member]
Significant Accounting Policies [Line Items]
Vesting period	3 years