Condensed Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Consolidated Statements of Income
Operating revenues	$ 99,541	$ 96,187	$ 198,335	$ 193,303
Operating expenses:
Cost of revenues (exclusive of depreciation and amortization)	40,605	39,219	83,084	79,402
Selling, general and administrative	29,554	29,767	59,419	59,499
Depreciation and amortization	22,493	21,941	44,443	43,221
Total operating expenses	92,652	90,927	186,946	182,122
Operating income	6,889	5,260	11,389	11,181
Other income (expense):
Interest expense	(4,484)	(4,166)	(8,724)	(8,503)
Interest income and other		4		11
Total other expense	(4,484)	(4,162)	(8,724)	(8,492)
Income before income tax provision	2,405	1,098	2,665	2,689
Income tax provision	960	643	1,066	1,257
Net income	$ 1,445	$ 455	$ 1,599	$ 1,432
Net income per common share -
Basic (in dollars per share)	$ 0.13	$ 0.04	$ 0.14	$ 0.13
Diluted (in dollars per share)	$ 0.13	$ 0.04	$ 0.14	$ 0.13
Weighted average shares used to compute net income per common share -
Basic (in shares)	11,511,591	10,797,111	11,493,712	10,744,944
Diluted (in shares)	11,525,850	11,258,178	11,523,215	11,261,535