Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 item	Jun. 30, 2012	Dec. 31, 2012
Segment Information
Number of reportable segments			2
Segment Information
Assets	$ 774,020		$ 774,020		$ 785,092
Operating revenues	96,997	94,689	192,961	192,263
Depreciation and amortization	19,841	17,354	38,558	33,942
Net income	3,951	5,521	5,798	5,728
Capital expenditures			42,023	40,200
Local voice and other retail services
Segment Information
Operating revenues	64,628	62,434	127,518	126,850
Network access services
Segment Information
Operating revenues	32,369	32,255	65,443	65,413
Wireline Services
Segment Information
Assets					784,585
Operating revenues	96,302	93,833	191,553	190,498
Depreciation and amortization	19,841	17,354	38,558	33,942
Net income	3,658	5,366	5,375	5,363
Capital expenditures			42,023	40,200
Wireline Services | Local voice and other retail services
Segment Information
Operating revenues	63,933	61,578	126,110	125,085
Wireline Services | Network access services
Segment Information
Operating revenues	32,369	32,255	65,443	65,413
Wireless
Segment Information
Assets					507
Operating revenues	1,075	1,232	2,175	2,484
Net income	293	155	423	365
Wireless | Local voice and other retail services
Segment Information
Operating revenues	1,075	1,232	2,175	2,484
Intersegment Elimination
Segment Information
Operating revenues	(380)	(376)	(767)	(719)
Intersegment Elimination | Local voice and other retail services
Segment Information
Operating revenues	$ (380)	$ (376)	$ (767)	$ (719)