CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
CONSOLIDATED STATEMENTS OF INCOME [Abstract]
Operating revenues	$ 251,145	$ 195,206	$ 160,935
Operating expenses
Cost of goods and services, exclusive of depreciation and amortization shown separately below	106,640	74,673	54,213
Selling, general and administrative, exclusive of depreciation and amortization shown separately below	56,445	45,572	31,152
Depreciation and amortization	55,770	42,630	32,630
Total operating expenses	218,855	162,875	117,995
Gain on sale of directory	0	4,000	0
Operating income	32,290	36,331	42,940
Other income (expense)
Interest expense	(8,289)	(4,716)	(1,361)
Gain (loss) on investments, net	(696)	(165)	124
Non-operating income, net	900	717	959
Income from continuing operations before income taxes	24,205	32,167	42,662
Income tax expense	10,667	13,393	17,510
Net income from continuing operations	13,538	18,774	25,152
Discontinued operations:
Loss from operations of Converged Services, net of tax benefits of $359, $480 and $6,507, respectively	(545)	(699)	(10,060)
Net income	$ 12,993	$ 18,075	$ 15,092
Basic and diluted net income per share:
Net income from continuing operations (in dollars per share)	$ 0.57	$ 0.79	$ 1.06
Loss from discontinued operations, net of income taxes (in dollars per share)	$ (0.02)	$ (0.03)	$ (0.42)
Net Income (in dollars per share)	$ 0.55	$ 0.76	$ 0.64
Weighted average shares outstanding, basic (in shares)	23,781	23,730	23,639
Weighted average shares outstanding, diluted (in shares)	23,826	23,823	23,701