UNAUDITED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 233,739	$ 246,879
Accounts receivable, net of allowances aggregating $26,358 and $25,661, respectively	521,563	557,131
Unbilled accounts receivable	33,333	40,775
Deferred costs	18,880	19,018
Inventories and supplies	143,052	168,663
Prepaid expenses and other current assets	56,263	57,435
Deferred tax assets	36,355	36,532
Total current assets	1,043,185	1,126,433
Property, plant and equipment, net	1,502,497	1,558,834
Other assets:
Deferred financing costs	16,761	17,580
Goodwill	445,412	452,669
Permits and other intangibles, net	520,045	530,080
Other	18,142	18,682
Total other assets	1,000,360	1,019,011
Total assets	3,546,042	3,704,278
Current liabilities:
Current portion of capital lease obligations	116	536
Accounts payable	244,216	267,329
Deferred revenue	62,677	62,966
Accrued expenses	187,728	219,549
Current portion of closure, post-closure and remedial liabilities	25,124	22,091
Total current liabilities	519,861	572,471
Other liabilities:
Closure and post-closure liabilities, less current portion of $8,272 and $4,999, respectively	42,848	45,702
Remedial liabilities, less current portion of $16,852 and $17,092, respectively	132,893	138,029
Long-term obligations	1,395,000	1,395,000
Deferred taxes, unrecognized tax benefits and other long-term liabilities	292,591	290,205
Total other liabilities	1,863,332	1,868,936
Commitments and contingent liabilities (See Note 15)
Stockholders’ equity:
Common stock, $.01 par value: Authorized 80,000,000; shares issued and outstanding 58,661,384 and 58,903,482 shares, respectively	587	589
Shares held under employee participation plan	(469)	(469)
Additional paid-in capital	789,501	805,029
Accumulated other comprehensive loss	(188,245)	(110,842)
Accumulated earnings	561,475	568,564
Total stockholders’ equity	1,162,849	1,262,871
Total liabilities and stockholders’ equity	$ 3,546,042	$ 3,704,278