CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current Assets:
Cash and cash equivalents	$ 74,186	$ 67,487
Receivables, net	248,233	250,154
Prepaid expenses and other current assets	30,012	32,136
Income taxes receivable	7,961	14,441
Total current assets	360,392	364,218
Property and equipment, net	455,041	456,384
Operating right-of-use assets	54,884	43,607
Restricted cash and investments	1,532	1,567
Intangible assets, net	482,127	489,573
Goodwill	413,526	413,126
Other assets	51,171	36,923
Total assets	1,818,673	1,805,398
Current Liabilities:
Accounts payable	63,933	64,793
Deferred revenue	19,903	15,950
Accrued liabilities	47,589	51,265
Accrued salaries and benefits	26,061	29,438
Income taxes payable	231	559
Current portion of long-term debt	3,359	3,359
Current portion of closure and post-closure obligations	6,322	5,771
Current portion of operating lease liabilities	17,780	15,799
Total current liabilities	185,178	186,934
Long-term debt	734,285	735,125
Long-term closure and post-closure obligations	93,332	93,149
Long-term operating lease liabilities	37,991	28,477
Other long-term liabilities	12,947	13,907
Deferred income taxes, net	123,702	123,482
Total liabilities	1,187,435	1,181,074
Commitments and contingencies (See Note 15)
Stockholders' Equity:
Common stock $0.01 par value per share, 50,000 authorized; 31,512 shares issued and outstanding	315	315
Additional paid-in capital	818,707	821,970
Retained deficit	(192,136)	(183,115)
Treasury stock, at cost, 141 and 242 shares, respectively	(6,177)	(10,652)
Accumulated other comprehensive income (loss)	10,529	(4,194)
Total stockholders' equity	631,238	624,324
Total liabilities and stockholders' equity	$ 1,818,673	$ 1,805,398