CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current Assets:
Cash and cash equivalents	$ 4,902	$ 7,015
Receivables, net	110,394	96,819
Prepaid expenses and other current assets	8,761	7,458
Income taxes receivable	2,070	4,076
Total current assets	126,127	115,368
Property and equipment, net	230,117	226,237
Restricted cash and investments	5,805	5,787
Intangible assets, net	229,967	234,356
Goodwill	194,224	193,621
Other assets	3,206	1,031
Total assets	789,446	776,400
Current Liabilities:
Accounts payable	13,513	13,948
Deferred revenue	12,712	7,820
Accrued liabilities	27,047	22,605
Accrued salaries and benefits	10,336	10,720
Income taxes payable	52	165
Current portion of closure and post-closure obligations	2,237	2,256
Short-term borrowings		2,177
Current portion of long-term debt		2,903
Total current liabilities	65,897	62,594
Long-term closure and post-closure obligations	74,374	72,826
Long-term debt	277,000	274,459
Other long-term liabilities	4,607	5,164
Deferred income taxes	80,419	81,333
Total liabilities	502,297	496,376
Commitments and contingencies
Stockholders' Equity:
Common stock $0.01 par value, 50,000 authorized; 21,827 and 21,780 shares issued, respectively	218	218
Additional paid-in capital	175,088	172,704
Retained earnings	124,263	121,879
Treasury stock, at cost, 2 and 7 shares, respectively	(25)	(52)
Accumulated other comprehensive loss	(12,395)	(14,725)
Total stockholders' equity	287,149	280,024
Total liabilities and stockholders' equity	$ 789,446	$ 776,400