Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
OPERATING ACTIVITIES:
Net income	$ 30,882	$ 2,448
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and other	23,619	11,577
Amortization of debt discount and deferred issuance costs	6,415	4,059
Amortization of debt discount and deferred issuance costs	2,714	2,741
Change in fair value of acquisition contingencies	745	0
Accretion of interest on deferred consideration	5,401	0
Amortization of inventory step-up to fair value	3,650	0
Change in deferred tax assets and liabilities		(247)
Loss on extinguishment of debt	6,965	0
Changes in assets and liabilities:
Accounts receivable	22,342	5,156
Inventories	3,710	3,216
Income taxes receivable	(1,291)	(866)
Prepaid expenses and other current and non-current assets	(11,525)	(1,908)
Accounts payable	(5,070)	(4,064)
Accrued payroll and related expenses	(1,505)	637
Other current and non-current liabilities	(590)	1,258
Net cash provided by operating activities:	86,462	24,007
INVESTING ACTIVITIES:
Acquisitions of property, equipment and intangibles	(13,577)	(8,070)
Acquisition of other businesses, net of cash acquired	0	(14,655)
Proceeds from sale of Summers Ridge Property	146,644	0
Net cash provided by (used for) investing activities:	133,067	(22,725)
FINANCING ACTIVITIES:
Proceeds from issuance of common stock	9,549	5,265
Payments on revolving credit facility	(10,000)	0
Payments on lease obligation	(60)	(44)
Repurchases of common stock	(3,607)	(488)
Payments on acquisition contingent consideration	(3,017)	(486)
Payments on deferred consideration	(46,000)	0
Payments on Term Loan	(161,813)
Payments of debt transaction costs	(2,002)	0
Net cash (used for) provided by financing activities:	(216,950)	4,247
Effect of exchange rates on cash	10	11
Net increase in cash and cash equivalents	2,589	5,540
Cash and cash equivalents, beginning of period	36,086	169,508
Cash and cash equivalents, end of period	38,675	175,048
SUPPLEMENTAL DISCLOSURES OF NON-CASH INVESTING AND FINANCING TRANSACTIONS:
Purchase of property, equipment and intangibles by incurring current liabilities	1,752	2,404
Decrease of accrued payroll and related expenses upon issuance of common stock	0	903
Extinguishment of Convertible Senior Notes through issuance of common stock	$ 200,185	$ 0