Consolidated Statements Of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenues
Revenues	$ 306,602	$ 318,270
Cost of revenues
Cost of revenues	205,722	218,083
Operating expenses
Selling, general, and administrative expenses	42,378	43,660
Restructuring expenses	1,209	0
Depreciation and accretion expense	32,211	32,973
Amortization of intangible assets	8,413	12,412
Loss on disposal and impairment of assets	921	968
Total operating expenses	85,132	90,013
Income from operations	15,748	10,174
Other expenses
Interest expense, net	6,421	6,643
Amortization of deferred financing costs and note discount	3,486	3,292
Other expenses (income)	3,829	(7,207)
Total other expenses	13,736	2,728
Income before income taxes	2,012	7,446
Income tax (benefit) expense	(3,737)	3,129
Net income	5,749	4,317
Net loss attributable to noncontrolling interests	(6)	(2)
Net income attributable to controlling interests and available to common shareholders	$ 5,755	$ 4,319
Net income per common share – basic (in dollars per share)	$ 0.13	$ 0.09
Net income per common share – diluted (in dollars per share)	$ 0.13	$ 0.09
Weighted average shares outstanding - basic (in shares)	44,729,824	46,223,764
Weighted average shares outstanding - diluted (in shares)	45,741,261	46,635,033
Service
Revenues
Revenues	$ 291,854	$ 302,602
Cost of revenues
Cost of revenues	193,665	206,158
Product and Service, Other [Member]
Revenues
Revenues	14,748	15,668
Cost of revenues
Cost of revenues	$ 12,057	$ 11,925