UNAUDITED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 179,191	$ 246,879
Accounts receivable, net of allowances aggregating $30,271 and $25,661, respectively	600,283	557,131
Unbilled accounts receivable	41,562	40,775
Deferred costs	19,096	19,018
Inventories and supplies	150,255	168,663
Prepaid expenses and other current assets	44,880	57,435
Deferred tax assets	37,288	36,532
Total current assets	1,072,555	1,126,433
Property, plant and equipment, net	1,531,548	1,558,834
Other assets:
Deferred financing costs	15,121	17,580
Goodwill	447,918	452,669
Permits and other intangibles, net	518,995	530,080
Other	13,724	18,682
Total other assets	995,758	1,019,011
Total assets	3,599,861	3,704,278
Current liabilities:
Current portion of capital lease obligations	11	536
Accounts payable	295,476	267,329
Deferred revenue	62,837	62,966
Accrued expenses	244,790	219,549
Current portion of closure, post-closure and remedial liabilities	21,902	22,091
Total current liabilities	625,016	572,471
Other liabilities:
Closure and post-closure liabilities, less current portion of $5,403 and $4,999, respectively	47,861	45,702
Remedial liabilities, less current portion of $16,499 and $17,092, respectively	126,816	138,029
Long-term obligations	1,395,000	1,395,000
Deferred taxes, unrecognized tax benefits and other long-term liabilities	282,447	290,205
Total other liabilities	$ 1,852,124	$ 1,868,936
Commitments and contingent liabilities (See Note 14)
Stockholders’ equity:
Common stock, $.01 par value: authorized 80,000,000; shares issued and outstanding XXXXXXX and 58,903,482 shares, respectively	$ 577	$ 589
Shares held under employee participation plan	(469)	(469)
Additional paid-in capital	740,070	805,029
Accumulated other comprehensive loss	(229,555)	(110,842)
Accumulated earnings	612,098	568,564
Total stockholders’ equity	1,122,721	1,262,871
Total liabilities and stockholders’ equity	$ 3,599,861	$ 3,704,278