Condensed Consolidated Statements of Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Condensed Consolidated Statements of Income (Loss)
Operating revenues	$ 97,848	$ 100,905	$ 296,183	$ 294,208
Operating expenses:
Cost of revenues (exclusive of depreciation and amortization)	41,903	41,013	124,987	120,415
Selling, general and administrative	29,206	33,146	88,625	92,645
Depreciation and amortization	23,036	22,551	67,479	65,772
Total operating expenses	94,145	96,710	281,091	278,832
Operating income	3,703	4,195	15,092	15,376
Other income (expense):
Interest expense	(4,156)	(4,148)	(12,879)	(12,651)
Interest income and other		4		15
Total other expense	(4,156)	(4,144)	(12,879)	(12,636)
Income (loss) before income tax provision (benefit)	(453)	51	2,213	2,740
Income tax provision (benefit)	(174)	(54)	892	1,204
Net income (loss)	$ (279)	$ 105	$ 1,321	$ 1,536
Net income (loss) per common share -
Basic (in dollars per share)	$ (0.02)	$ 0.01	$ 0.11	$ 0.14
Diluted (in dollars per share)	$ (0.02)	$ 0.01	$ 0.11	$ 0.14
Weighted average shares used to compute net income (loss) per common share -
Basic (in shares)	11,512,280	11,040,299	11,499,947	10,844,478
Diluted (in shares)	11,512,280	11,318,641	11,539,828	11,275,655