Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Consolidated Statements of Income
Operating revenues	$ 393,413	$ 390,739	$ 391,150
Operating expenses:
Cost of revenues (exclusive of depreciation and amortization)	162,474	166,280	163,749
Selling, general and administrative	123,798	115,974	114,875
Gain on sale of property			(6,546)
Depreciation and amortization	87,879	78,014	77,301
Total operating expenses	374,151	360,268	349,379
Operating income	19,262	30,471	41,771
Other income (expense):
Interest expense	(16,786)	(16,496)	(18,875)
Loss on early extinguishment of debt			(3,660)
Interest income and other	(19)	34	34
Total other expense	(16,805)	(16,462)	(22,501)
Income before income tax provision	2,457	14,009	19,270
Income tax provision (benefit)	1,357	5,910	8,782
Net income	$ 1,100	$ 8,099	$ 10,488
Net income per common share -
Basic (in dollars per share)	$ 0.10	$ 0.76	$ 1.01
Diluted (in dollars per share)	$ 0.10	$ 0.72	$ 0.95
Weighted average shares used to compute net income per common share -
Basic (in shares)	10,977,341	10,591,351	10,337,339
Diluted (in shares)	11,386,303	11,308,051	11,093,931