CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 246,879	$ 310,073
Marketable securities	0us-gaap_MarketableSecuritiesCurrent	12,435us-gaap_MarketableSecuritiesCurrent
Accounts receivable, net of allowances aggregating $25,661 and $18,106, respectively	557,131us-gaap_AccountsReceivableNetCurrent	579,394us-gaap_AccountsReceivableNetCurrent
Unbilled accounts receivable	40,775clh_UnbilledAccountsReceivableCurrent	26,568clh_UnbilledAccountsReceivableCurrent
Deferred costs	19,018us-gaap_DeferredFinanceCostsCurrentNet	16,134us-gaap_DeferredFinanceCostsCurrentNet
Inventories and supplies	168,663us-gaap_Supplies	152,096us-gaap_Supplies
Prepaid expenses and other current assets	57,435	41,962
Deferred tax assets	36,532us-gaap_DeferredTaxAssetsNetCurrent	32,517us-gaap_DeferredTaxAssetsNetCurrent
Total current assets	1,126,433us-gaap_AssetsCurrent	1,171,179us-gaap_AssetsCurrent
Property, plant and equipment, net	1,558,834us-gaap_PropertyPlantAndEquipmentNet	1,602,170us-gaap_PropertyPlantAndEquipmentNet
Other assets:
Deferred financing costs	17,580	20,860
Goodwill	452,669us-gaap_Goodwill	570,960us-gaap_Goodwill
Permits and other intangibles, net	530,080	569,973
Other	18,682us-gaap_OtherAssetsNoncurrent	18,536us-gaap_OtherAssetsNoncurrent
Total other assets	1,019,011	1,180,329
Total assets	3,704,278us-gaap_Assets	3,953,678us-gaap_Assets
Current liabilities:
Current portion of capital lease obligations	536us-gaap_CapitalLeaseObligationsCurrent	1,329us-gaap_CapitalLeaseObligationsCurrent
Accounts payable	267,329us-gaap_AccountsPayableCurrent	316,462us-gaap_AccountsPayableCurrent
Deferred revenue	62,966	55,454
Accrued expenses	219,549us-gaap_AccruedLiabilitiesCurrent	236,829us-gaap_AccruedLiabilitiesCurrent
Current portion of closure, post-closure and remedial liabilities	22,091	29,471
Total current liabilities	572,471us-gaap_LiabilitiesCurrent	639,545us-gaap_LiabilitiesCurrent
Other liabilities:
Closure and post-closure liabilities, less current portion of $4,999 and $5,884, respectively	45,702	41,201
Remedial liabilities, less current portion of $17,092 and $23,587, respectively	138,029	148,911
Long-term obligations	1,395,000us-gaap_LongTermDebtNoncurrent	1,400,000us-gaap_LongTermDebtNoncurrent
Capital lease obligations, less current portion	0	1,435
Deferred taxes, unrecognized tax benefits and other long-term liabilities	290,205	246,947
Total other liabilities	1,868,936us-gaap_LiabilitiesNoncurrent	1,838,494us-gaap_LiabilitiesNoncurrent
Commitments and contingent liabilities (See Note 16)
Stockholders' equity:
Authorized 80,000,000 shares; issued and outstanding 58,903,482 and 60,672,180 shares, respectively	589us-gaap_CommonStockValue	607us-gaap_CommonStockValue
Shares held under employee participation plan	(469)	(469)
Additional paid-in capital	805,029	898,165
Accumulated other comprehensive loss	(110,842)	(19,556)
Accumulated earnings	568,564	596,892
Total stockholders' equity	1,262,871	1,475,639
Total liabilities and stockholders' equity	$ 3,704,278	$ 3,953,678

The amount of estimated costs accrued as of the balance sheet date to comply with regulatory requirements pertaining to the retirement of a waste management facility (such as a landfill or waste treatment facility) and to remediate one or more sites. Represents the portion that will be paid within one year.

No definition available.