GUARANTOR AND NON-GUARANTOR SUBSIDIARIES FINANCIAL INFORMATION (Condensed Consolidating Balance Sheets) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012
ASSETS
Cash and cash equivalents	$ 278,644	$ 310,073	$ 263,478	$ 229,836
Intercompany receivables	0	0
Accounts receivable, net	575,187	579,394
Other current assets	296,460	281,712
Property, plant and equipment, net	1,611,298	1,602,170
Investments in subsidiaries	0	0
Intercompany debt receivable	0	0
Goodwill	578,974	570,960
Permits and other intangibles, net	553,658	569,973
Other long-term assets	38,222	39,396
Total assets	3,932,443	3,953,678
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities	606,266	639,545
Intercompany payables	0	0
Closure, post-closure and remedial liabilities, net	181,666	190,112
Long-term obligations	1,395,000	1,400,000
Capital lease obligations, net	827	1,435
Intercompany debt payable	0	0
Other long-term liabilities	249,968	246,947
Total liabilities	2,433,727	2,478,039
Stockholders’ equity	1,498,716	1,475,639
Total liabilities and stockholders’ equity	3,932,443	3,953,678
Clean Harbors, Inc.
ASSETS
Cash and cash equivalents	1,006	1,006	1,006	35,214
Intercompany receivables	237,556	269,580
Accounts receivable, net	0	0
Other current assets	24,087	24,087
Property, plant and equipment, net	0	0
Investments in subsidiaries	2,762,237	2,683,158
Intercompany debt receivable	0	0
Goodwill		0
Permits and other intangibles, net		0
Other long-term assets	25,457	23,770
Total assets	3,050,343	3,001,601
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities	61,029	33,626
Intercompany payables	0	0
Closure, post-closure and remedial liabilities, net	0	0
Long-term obligations	1,395,000	1,400,000
Capital lease obligations, net	0	0
Intercompany debt payable	3,701	3,701
Other long-term liabilities	91,897	88,635
Total liabilities	1,551,627	1,525,962
Stockholders’ equity	1,498,716	1,475,639
Total liabilities and stockholders’ equity	3,050,343	3,001,601
U.S. Guarantor Subsidiaries
ASSETS
Cash and cash equivalents	193,821	235,445	214,427	140,683
Intercompany receivables	2,446	2,448
Accounts receivable, net	399,423	387,006
Other current assets	194,211	182,881
Property, plant and equipment, net	961,240	945,280
Investments in subsidiaries	760,718	967,186
Intercompany debt receivable	379,428	493,402
Goodwill	424,057	415,541
Permits and other intangibles, net	447,638	458,917
Other long-term assets	3,759	7,018
Total assets	3,766,741	4,095,124
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities	429,490	466,454
Intercompany payables	321,533	499,749
Closure, post-closure and remedial liabilities, net	150,250	158,298
Long-term obligations	0	0
Capital lease obligations, net	129	191
Intercompany debt payable	0	0
Other long-term liabilities	103,102	103,125
Total liabilities	1,004,504	1,227,817
Stockholders’ equity	2,762,237	2,867,307
Total liabilities and stockholders’ equity	3,766,741	4,095,124
Foreign Non-Guarantor Subsidiaries
ASSETS
Cash and cash equivalents	83,817	73,622	48,045	53,939
Intercompany receivables	84,029	230,224
Accounts receivable, net	175,764	192,388
Other current assets	78,162	74,744
Property, plant and equipment, net	650,058	656,890
Investments in subsidiaries	0	144,953
Intercompany debt receivable	3,701	3,701
Goodwill	154,917	155,419
Permits and other intangibles, net	106,020	111,056
Other long-term assets	9,006	8,608
Total assets	1,345,474	1,651,605
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities	115,747	139,465
Intercompany payables	2,498	2,503
Closure, post-closure and remedial liabilities, net	31,416	31,814
Long-term obligations	0	0
Capital lease obligations, net	698	1,244
Intercompany debt payable	379,428	493,402
Other long-term liabilities	54,969	55,187
Total liabilities	584,756	723,615
Stockholders’ equity	760,718	927,990
Total liabilities and stockholders’ equity	1,345,474	1,651,605
Consolidating Adjustments
ASSETS
Cash and cash equivalents	0	0
Intercompany receivables	(324,031)	(502,252)
Accounts receivable, net		0
Other current assets	0	0
Property, plant and equipment, net	0	0
Investments in subsidiaries	(3,522,955)	(3,795,297)
Intercompany debt receivable	(383,129)	(497,103)
Goodwill		0
Permits and other intangibles, net		0
Other long-term assets	0	0
Total assets	(4,230,115)	(4,794,652)
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities	0	0
Intercompany payables	(324,031)	(502,252)
Closure, post-closure and remedial liabilities, net	0	0
Long-term obligations	0	0
Capital lease obligations, net	0	0
Intercompany debt payable	(383,129)	(497,103)
Other long-term liabilities	0	0
Total liabilities	(707,160)	(999,355)
Stockholders’ equity	(3,522,955)	(3,795,297)
Total liabilities and stockholders’ equity	$ (4,230,115)	$ (4,794,652)