Condensed Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Condensed Consolidated Statements of Income
Operating revenues	$ 96,187	$ 96,784	$ 193,303	$ 193,856
Operating expenses:
Cost of revenues (exclusive of depreciation and amortization)	39,219	41,288	79,402	82,236
Selling, general and administrative	29,767	28,720	59,499	57,986
Depreciation and amortization	21,941	18,884	43,221	37,604
Total operating expenses	90,927	88,892	182,122	177,826
Operating income	5,260	7,892	11,181	16,030
Other income (expense):
Interest expense	(4,166)	(4,109)	(8,503)	(8,298)
Interest income and other	4	5	11	13
Total other expense	(4,162)	(4,104)	(8,492)	(8,285)
Income before income tax provision	1,098	3,788	2,689	7,745
Income tax provision	643	1,549	1,257	3,141
Net income	$ 455	$ 2,239	$ 1,432	$ 4,604
Net income per common share -
Basic (in dollars per share)	$ 0.04	$ 0.21	$ 0.13	$ 0.44
Diluted (in dollars per share)	$ 0.04	$ 0.20	$ 0.13	$ 0.41
Weighted average shares used to compute net income per common share -
Basic (in shares)	10,797,111	10,585,736	10,744,944	10,557,047
Diluted (in shares)	11,258,178	11,263,618	11,261,535	11,300,608