Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Apr. 30, 2014	Apr. 30, 2013
CURRENT ASSETS:
Cash and cash equivalents	$ 2,205	$ 2,464	$ 1,755
Restricted cash	76	76	76
Accounts receivable - trade, net of allowance for doubtful accounts of $2,153, $1,672 and $1,332	55,750us-gaap_AccountsReceivableNetCurrent	52,603us-gaap_AccountsReceivableNetCurrent	48,689us-gaap_AccountsReceivableNetCurrent
Refundable income taxes	554us-gaap_IncomeTaxesReceivable	465us-gaap_IncomeTaxesReceivable	128us-gaap_IncomeTaxesReceivable
Prepaid expenses	8,763us-gaap_PrepaidExpenseCurrent	7,176us-gaap_PrepaidExpenseCurrent	5,711us-gaap_PrepaidExpenseCurrent
Inventory	4,374us-gaap_InventoryGross	3,905us-gaap_InventoryGross	3,494us-gaap_InventoryGross
Deferred income taxes	2,095us-gaap_DeferredTaxAssetsNetCurrent	2,502us-gaap_DeferredTaxAssetsNetCurrent	3,730us-gaap_DeferredTaxAssetsNetCurrent
Other current assets	4,852us-gaap_OtherAssetsCurrent	1,255us-gaap_OtherAssetsCurrent	901us-gaap_OtherAssetsCurrent
Current assets of discontinued operations		359	61
Total current assets	78,669us-gaap_AssetsCurrent	70,805us-gaap_AssetsCurrent	64,545us-gaap_AssetsCurrent
Property, plant and equipment, net of accumulated depreciation and amortization of $736,839, $695,935 and $645,567	414,542us-gaap_PropertyPlantAndEquipmentNet	403,424us-gaap_PropertyPlantAndEquipmentNet	422,502us-gaap_PropertyPlantAndEquipmentNet
Goodwill	119,170us-gaap_Goodwill	119,139us-gaap_Goodwill	115,928us-gaap_Goodwill
Intangible assets, net	11,808us-gaap_FiniteLivedIntangibleAssetsNet	13,420us-gaap_FiniteLivedIntangibleAssetsNet	11,674us-gaap_FiniteLivedIntangibleAssetsNet
Restricted assets	6,632	681	545
Notes receivable - related party		149	147
Investments in unconsolidated entities	14,432	16,752	20,252
Other non-current assets	24,542us-gaap_OtherAssetsNoncurrent	24,205us-gaap_OtherAssetsNoncurrent	27,526us-gaap_OtherAssetsNoncurrent
Non-current assets of discontinued operations		1,471
Total assets	669,795us-gaap_Assets	649,897us-gaap_Assets	663,119us-gaap_Assets
CURRENT LIABILITIES:
Current maturities of long-term debt and capital leases	1,656	885	1,218
Accounts payable	48,518us-gaap_AccountsPayableCurrent	51,788us-gaap_AccountsPayableCurrent	51,974us-gaap_AccountsPayableCurrent
Accrued payroll and related expenses	6,289	6,062	3,983
Accrued interest	11,094us-gaap_InterestPayableCurrent	6,087us-gaap_InterestPayableCurrent	6,074us-gaap_InterestPayableCurrent
Current accrued capping, closure and post-closure costs	2,208	7,312	3,835
Other accrued liabilities	16,667us-gaap_OtherAccruedLiabilitiesCurrent	17,612us-gaap_OtherAccruedLiabilitiesCurrent	21,014us-gaap_OtherAccruedLiabilitiesCurrent
Total current liabilities	86,432us-gaap_LiabilitiesCurrent	89,746us-gaap_LiabilitiesCurrent	88,098us-gaap_LiabilitiesCurrent
Long-term debt and capital leases, less current portion	534,055	507,134	494,987
Accrued capping, closure and post-closure costs, less current portion	37,621	37,342	39,335
Deferred income taxes	7,080	6,954	6,798
Other long-term liabilities	16,627us-gaap_OtherLiabilitiesNoncurrent	17,258us-gaap_OtherLiabilitiesNoncurrent	18,450us-gaap_OtherLiabilitiesNoncurrent
COMMITMENTS AND CONTINGENCIES
Casella Waste Systems, Inc. stockholders' (deficit) equity:
Additional paid-in capital	340,773	338,625	335,857
Accumulated deficit	(353,490)	(347,472)	(324,377)
Accumulated other comprehensive income (loss)	58	39	(592)
Total Casella Waste Systems, Inc. stockholders' (deficit) equity	(12,253)us-gaap_StockholdersEquity	(8,407)us-gaap_StockholdersEquity	11,285us-gaap_StockholdersEquity
Noncontrolling interests	233us-gaap_MinorityInterest	(130)us-gaap_MinorityInterest	4,166us-gaap_MinorityInterest
Total stockholders' (deficit) equity	(12,020)	(8,537)	15,451
Total liabilities and stockholders' (deficit) equity	669,795	649,897	663,119
Class A Common Stock [Member]
Casella Waste Systems, Inc. stockholders' (deficit) equity:
Common stock	396	391	387
Total stockholders' (deficit) equity	396	391	387
Class B Common Stock [Member]
Casella Waste Systems, Inc. stockholders' (deficit) equity:
Common stock	10	10	10
Total stockholders' (deficit) equity	$ 10	$ 10	$ 10

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19

-Subparagraph a

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(a))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682