CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current Assets:
Cash and cash equivalents	$ 9,244	$ 7,015
Receivables, net	117,140	96,819
Prepaid expenses and other current assets	10,463	7,458
Income taxes receivable	2,524	4,076
Total current assets	139,371	115,368
Property and equipment, net	230,874	226,237
Restricted cash and investments	5,812	5,787
Intangible assets, net	228,736	234,356
Goodwill	194,948	193,621
Other assets	2,910	1,031
Total assets	802,651	776,400
Current Liabilities:
Accounts payable	13,560	13,948
Deferred revenue	12,237	7,820
Accrued liabilities	26,821	22,605
Accrued salaries and benefits	13,497	10,720
Income taxes payable	1,319	165
Current portion of closure and post-closure obligations	2,271	2,256
Short-term borrowings		2,177
Current portion of long-term debt		2,903
Total current liabilities	69,705	62,594
Long-term closure and post-closure obligations	74,918	72,826
Long-term debt	277,000	274,459
Other long-term liabilities	4,101	5,164
Deferred income taxes	81,265	81,333
Total liabilities	506,989	496,376
Commitments and contingencies
Stockholders' Equity:
Common stock $0.01 par value, 50,000 authorized; 21,849 and 21,780 shares issued, respectively	218	218
Additional paid-in capital	176,523	172,704
Retained earnings	128,699	121,879
Treasury stock, at cost, 2 and 7 shares, respectively	(68)	(52)
Accumulated other comprehensive loss	(9,710)	(14,725)
Total stockholders' equity	295,662	280,024
Total liabilities and stockholders' equity	$ 802,651	$ 776,400