Condensed Consolidated Statements of Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Condensed Consolidated Statements of Income (Loss)
Operating revenues	$ 94,510	$ 98,794
Operating expenses:
Cost of revenues (exclusive of depreciation and amortization)	41,191	42,479
Selling, general and administrative	31,395	29,865
Depreciation and amortization	21,269	21,950
Total operating expenses	93,855	94,294
Operating income	655	4,500
Other income (expense):
Interest expense	(3,993)	(4,240)
Total other expense	(3,993)	(4,240)
Income (loss) before income tax provision (benefit)	(3,338)	260
Income tax provision (benefit)	(1,386)	106
Net income (loss)	$ (1,952)	$ 154
Net income (loss) per common share -
Basic (in dollars per share)	$ (0.17)	$ 0.01
Diluted (in dollars per share)	$ (0.17)	$ 0.01
Weighted average shares used to compute net income (loss) per common share -
Basic (in shares)	11,529,046	11,475,834
Diluted (in shares)	11,529,046	11,500,308