Consolidated Statements of Cash Flows - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities
Net loss		$ (11,521)	$ (20,846)	$ (45,106)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization		91,474	77,535	71,649
Accretion of contract rights under development agreements and placement fees	[1]	6,378	4,552	4,680
Amortization of deferred loan costs and discount		1,917	1,826	2,976
Payment-in-kind interest capitalized				15,935
Payment-in-kind interest payments			(37,624)	(2,698)
Write-off of deferred loan cost and discount			3,876	3,294
Stock-based compensation expense		9,001	10,933
Provision (benefit) for bad debts		294	(441)	651
Loss on disposition of assets		1,068	1,963	3,901
Impairment of assets		5,343	6,089	584
Fair value adjustment of contingent consideration		501	701
Deferred income tax		(1,927)	(970)	(7,062)
Changes in assets and liabilities related to operations:
Accounts receivable		(15,033)	(11,488)	(8,348)
Inventories		490	4,907	(1,636)
Prepaid expenses		715	(895)	(599)
Deposits and other		(449)	(748)	(374)
Other assets, non-current		6,565	12,204	(2,290)
Accounts payable and accrued liabilities		(6,827)	(6,063)	8,451
Net cash provided by operating activities		87,989	45,511	44,008
Cash flows from investing activities
Customer notes receivable		(2,382)
Business acquisitions, net of cash acquired		(54,935)	(4,452)	(63,850)
Purchase of intangible assets		(6,295)	(1,119)	(1,226)
Software development and other expenditures		(14,350)	(10,460)	(7,664)
Proceeds from disposition of assets		450	519	514
Purchases of property and equipment		(50,420)	(54,602)	(48,585)
Net cash used in investing activities		(127,932)	(70,114)	(120,811)
Cash flows from financing activities
Repayment of first lien credit facilities		(5,387)	(5,211)	(2,413)
Repayment of senior secured credit facilities			(115,000)	(410,655)
Repayment of seller notes				(12,401)
Payments on equipment long term note payable and capital leases		(1,396)	(2,883)	(2,372)
Payment of deferred loan costs			(41)	(3,267)
Payment of financed placement fee obligations		(8,215)	(3,628)	(3,807)
Payment of previous acquisition obligation		(1,748)		(128)
Proceeds from stock option exercise		685	774
Proceeds from issuance of common stock			176,341
Proceeds from employees in advance of common stock issuance				25
Initial public offering costs			(4,160)	(653)
Repurchase of shares		(1,320)
Distributions to non-controlling interest owners		(302)
Net cash (used in) provided by financing activities		(17,683)	76,066	78,054
Effect of exchange rates on cash, cash equivalents and restricted cash		4	(1)	14
(Decrease) increase in cash, cash equivalents and restricted cash		(57,622)	51,462	1,265
Cash, cash equivalents and restricted cash, beginning of period		70,804	19,342	18,077
Cash, cash equivalents and restricted cash, end of period		13,182	70,804	19,342
Supplemental cash flow information:
Cash paid during the period for interest		33,567	35,392	35,890
Cash paid during the period for taxes		1,548	1,742	1,157
Non-cash investing and financing activities:
Non-cash consideration given in business acquistion			500	2,600
Intangible assets obtained under placement fee arrangements		40,338	2,000	4,866
Leased assets obtained in exchange for new finance lease liabilities		1,326	1,454	368
Leased assets obtained in exchange for new operating lease liabilities		13,048
The First Lien Credit Agreement [Member]
Cash flows from financing activities
Proceeds from debt				448,725
The December Incremental Term Loans [Member]
Cash flows from financing activities
Proceeds from debt			$ 29,874	$ 65,000

[1] Non-cash item related to the accretion of contract rights under development agreements and placement fees.