GUARANTOR AND NON-GUARANTOR SUBSIDIARIES FINANCIAL INFORMATION (Condensed Consolidating Statements of (Loss) Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Consolidating statement of income
Service revenues	$ 660,095	$ 672,622
Product revenues	186,572	189,541
Total revenues	846,667	862,163
Service cost of revenues	466,799	468,372
Product cost of revenues	158,920	167,652
Total cost of revenues	625,719	636,024
Selling, general and administrative expenses	118,962	128,470
Accretion of environmental liabilities	2,724	2,835
Depreciation and amortization	69,356	60,006
Income from operations	29,906	34,828
Other income	4,178	525
Interest (expense) income	(19,554)	(19,873)
Equity in earnings of subsidiaries	0	0
Intercompany dividend income	0	0
Intercompany interest income (expense)	0	0
Income before provision for income taxes	14,530	15,480
Provision for income taxes	5,570	4,978
Net income	8,960	10,502
Other comprehensive (loss) income	(41,525)	(23,861)
Comprehensive (loss) income	(32,565)	(13,359)
Clean Harbors, Inc.
Consolidating statement of income
Service revenues	0	0
Product revenues	0	0
Total revenues	0	0
Service cost of revenues	0	0
Product cost of revenues	0	0
Total cost of revenues	0	0
Selling, general and administrative expenses	31	25
Accretion of environmental liabilities	0	0
Depreciation and amortization	0	0
Income from operations	(31)	(25)
Other income	0	0
Interest (expense) income	(19,734)	(19,800)
Equity in earnings of subsidiaries	30,109	30,221
Intercompany dividend income	0	0
Intercompany interest income (expense)	0	0
Income before provision for income taxes	10,344	10,396
Provision for income taxes	1,384	(106)
Net income	8,960	10,502
Other comprehensive (loss) income	(41,525)	(23,861)
Comprehensive (loss) income	(32,565)	(13,359)
U.S. Guarantor Subsidiaries
Consolidating statement of income
Service revenues	443,874	399,235
Product revenues	134,875	160,863
Total revenues	578,749	560,098
Service cost of revenues	304,641	274,172
Product cost of revenues	114,928	143,641
Total cost of revenues	419,569	417,813
Selling, general and administrative expenses	87,553	95,561
Accretion of environmental liabilities	2,348	2,400
Depreciation and amortization	42,732	37,289
Income from operations	26,547	7,035
Other income	909	720
Interest (expense) income	230	0
Equity in earnings of subsidiaries	8,462	21,413
Intercompany dividend income	0	0
Intercompany interest income (expense)	9,384	10,338
Income before provision for income taxes	45,532	39,506
Provision for income taxes	4,105	(474)
Net income	41,427	39,980
Other comprehensive (loss) income	(41,525)	(23,861)
Comprehensive (loss) income	(98)	16,119
Foreign Non-Guarantor Subsidiaries
Consolidating statement of income
Service revenues	219,005	281,419
Product revenues	52,493	30,942
Total revenues	271,498	312,361
Service cost of revenues	164,942	202,232
Product cost of revenues	44,788	26,275
Total cost of revenues	209,730	228,507
Selling, general and administrative expenses	31,378	32,884
Accretion of environmental liabilities	376	435
Depreciation and amortization	26,624	22,717
Income from operations	3,390	27,818
Other income	3,269	(195)
Interest (expense) income	(50)	(73)
Equity in earnings of subsidiaries	0	0
Intercompany dividend income	3,100	3,645
Intercompany interest income (expense)	(9,384)	(10,338)
Income before provision for income taxes	325	20,857
Provision for income taxes	81	5,558
Net income	244	15,299
Other comprehensive (loss) income	19,682	11,772
Comprehensive (loss) income	19,926	27,071
Consolidating Adjustments
Consolidating statement of income
Service revenues	(2,784)	(8,032)
Product revenues	(796)	(2,264)
Total revenues	(3,580)	(10,296)
Service cost of revenues	(2,784)	(8,032)
Product cost of revenues	(796)	(2,264)
Total cost of revenues	(3,580)	(10,296)
Selling, general and administrative expenses	0	0
Accretion of environmental liabilities	0	0
Depreciation and amortization	0	0
Income from operations	0	0
Other income	0	0
Interest (expense) income	0	0
Equity in earnings of subsidiaries	(38,571)	(51,634)
Intercompany dividend income	(3,100)	(3,645)
Intercompany interest income (expense)	0	0
Income before provision for income taxes	(41,671)	(55,279)
Provision for income taxes	0	0
Net income	(41,671)	(55,279)
Other comprehensive (loss) income	21,843	12,089
Comprehensive (loss) income	$ (19,828)	$ (43,190)