Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 91,475	$ 79,612
Accounts receivable, net	64,054	54,002
Inventory	33,949	35,744
Other current assets	12,043	9,625
Assets held for sale	0	5,242
Total current assets	201,521	184,225
Property, plant and equipment, net	116,441	120,171
Intangibles, net	356,883	376,012
Goodwill	61,189	58,632
Deferred tax assets, net	66,493	70,147
Other long-term assets	45,289	60,634
Total assets	847,816	869,821
Current liabilities
Current portion of long-term debt and other borrowings	10,356	20,701
Accounts payable	20,508	16,284
Accrued expenses and other liabilities	46,039	41,726
Liabilities held for sale	0	1,793
Total current liabilities	76,903	80,504
Asset retirement obligations	15,185	14,020
Long-term debt, net and other borrowings	166,741	197,699
Other long-term liabilities	89,643	63,393
Total liabilities	348,472	355,616
Commitments and contingencies (See Note 19)
Stockholders’ equity
Preferred stock ($0.01 par value, 25,000 shares authorized; no shares issued and outstanding)	0	0
Common stock ($0.01 par value, 250,000 shares authorized; 67,659 and 66,875 shares issued and outstanding, respectively)	677	669
Additional paid-in capital	680,819	665,530
Accumulated deficit	(181,010)	(149,946)
Accumulated other comprehensive loss	(1,142)	(2,048)
Total stockholders’ equity	499,344	514,205
Total liabilities and stockholders’ equity	$ 847,816	$ 869,821