CONSOLIDATED STATEMENTS OF INCOME (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Operating revenue:
Services	$ 34,213	$ 33,405
Equipment	10,027	15,364
Total operating revenue	44,240	48,769
Costs and expenses:
Cost of sales, excluding depreciation and amortization	8,544	13,222
Cost of services, excluding depreciation and amortization	16,660	16,599
Selling, general and administrative expenses	6,963	7,449
Asset impairment	0	633
Depreciation and amortization	7,580	7,009
Total costs and expenses	39,747	44,912
Operating income	4,493	3,857
Other income and expense:
Interest and other income	0	2
Interest expense	(979)	(1,139)
Total other expense	(979)	(1,137)
Income before income taxes	3,514	2,720
Income tax provision	1,441	1,094
Net income	$ 2,073	$ 1,626
Basic earnings per share	$ 0.15	$ 0.12
Weighted average common shares outstanding	13,596,296	13,556,515
Diluted earnings per share	$ 0.15	$ 0.12
Weighted average common and equivalent shares outstanding	13,659,827	13,578,429
Dividends per share	$ 0.15	$ 0.145