Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues:
Revenues	$ 1,093,999	$ 1,349,405	$ 1,345,243
Cost of revenues:
Cost of revenues	692,651	884,979	897,783
Operating expenses:
Selling, general, and administrative expenses	160,053	177,474	170,490
Restructuring expenses	9,443	8,928	6,586
Acquisition related expenses (See Note 24)	8,836	0	3,191
Depreciation and accretion expense	133,210	130,676	126,199
Amortization of intangible assets	31,874	49,261	52,911
Loss on disposal and impairment of assets	4,144	11,653	17,873
Total operating expenses	347,560	377,992	377,250
Income from operations	53,788	86,434	70,210
Other expenses (income):
Interest expense, net	37,097	26,604	35,429
Amortization of deferred financing costs and note discount	12,161	13,447	14,887
Redemption costs for early extinguishment of debt	3,018	0	6,408
Other income, net	(18,077)	(18,404)	(627)
Total other expenses	34,199	21,647	56,097
Income before income taxes	19,589	64,787	14,113
Income tax expense	452	16,522	10,457
Net income	19,137	48,265	3,656
Net loss attributable to noncontrolling interests	(7)	(9)	(20)
Net income attributable to controlling interests and available to common shareholders	$ 19,144	$ 48,274	$ 3,676
Net income per common share – basic (in dollars per share)	$ 0.43	$ 1.06	$ 0.08
Net income per common share – diluted (in dollars per share)	$ 0.42	$ 1.05	$ 0.08
Weighted average shares outstanding – basic (in shares)	44,537,467	45,514,703	45,988,775
Weighted average shares outstanding – diluted (in shares)	45,397,494	46,015,334	46,436,439
ATM operating revenues
Revenues:
Revenues	$ 1,040,779	$ 1,281,106	$ 1,292,930
Cost of revenues:
Cost of revenues	652,906	830,359	855,948
ATM product sales and other revenues
Revenues:
Revenues	53,220	68,299	52,313
Cost of revenues:
Cost of revenues	$ 39,745	$ 54,620	$ 41,835