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GOODWILL AND OTHER INTANGIBLE ASSETS (Details) (USD $)
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12 Months Ended | 12 Months Ended | 12 Months Ended | 12 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 12 Months Ended | 3 Months Ended | |||||||||||||||||||||||||||
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Dec. 31, 2012
Permit
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2009
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Dec. 31, 2012
Patents [Member]
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Dec. 31, 2011
Patents [Member]
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Dec. 31, 2012
Patents [Member]
Minimum [Member]
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Dec. 31, 2012
Patents [Member]
Maximum [Member]
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Dec. 31, 2012
Software [Member]
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Dec. 31, 2011
Software [Member]
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Dec. 31, 2012
Noncompete Agreements [Member]
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Dec. 31, 2011
Noncompete Agreements [Member]
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Dec. 31, 2012
Customer Contracts [Member]
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Dec. 31, 2011
Customer Contracts [Member]
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Dec. 31, 2012
Customer Relationships [Member]
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Dec. 31, 2011
Customer Relationships [Member]
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Sep. 30, 2012
Treatment [Member]
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Dec. 31, 2011
Treatment [Member]
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Dec. 31, 2012
Treatment [Member]
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Dec. 31, 2011
Services [Member]
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Dec. 31, 2012
Services [Member]
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Dec. 31, 2011
CH Plateau Remediation Company [Member]
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Sep. 30, 2012
CH Plateau Remediation Company [Member]
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| Goodwill [Line Items] | ||||||||||||||||||||||||||||||||||||
| Goodwill after earn-out and acquisition | $ 14,840,000 | |||||||||||||||||||||||||||||||||||
| Goodwill [Roll Forward] | ||||||||||||||||||||||||||||||||||||
| Goodwill, Beginning Balance | 29,186,000 | [1],[2] | 29,186,000 | [1],[2] | 15,330,000 | [1] | 14,000,000 | [1] | 13,691,000 | [1] | 1,330,000 | [1] | 15,495,000 | [1] | 3,637,000 | |||||||||||||||||||||
| Goodwill Recorded in connection with Earn-Out | 840,000 | [1] | 840,000 | [1] | 0 | [1] | ||||||||||||||||||||||||||||||
| Additional Goodwill Recorded as Result of Acquisition | 13,016,000 | [1] | 0 | [1] | 13,016,000 | [1] | ||||||||||||||||||||||||||||||
| Reassignment of goodwill from change in reporting unit | 0 | [1] | 2,488,000 | (1,149,000) | [1] | 1,149,000 | [1] | 3,637,000 | ||||||||||||||||||||||||||||
| Goodwill, Ending Balance | 29,186,000 | [1] | 29,186,000 | [1] | 29,186,000 | [1],[2] | 15,330,000 | [1] | 13,691,000 | [1] | 13,691,000 | [1] | 15,495,000 | [1] | 15,495,000 | [1] | 14,840,000 | 3,637,000 | ||||||||||||||||||
| Finite-Lived Intangible Assets [Line Items] | ||||||||||||||||||||||||||||||||||||
| Useful Lives | 8 years | 18 years | 3 years | 5 years | 6 months | 12 years | ||||||||||||||||||||||||||||||
| Gross Carrying Amount | 5,033,000 | 5,033,000 | 4,985,000 | 453,000 | 402,000 | 380,000 | 158,000 | 265,000 | 265,000 | 565,000 | 790,000 | 3,370,000 | 3,370,000 | |||||||||||||||||||||||
| Accumulated Amortization | (1,423,000) | (1,423,000) | (468,000) | (105,000) | (77,000) | (145,000) | (66,000) | (62,000) | (9,000) | (565,000) | (230,000) | (546,000) | (86,000) | |||||||||||||||||||||||
| Net Carrying Amount | 3,610,000 | 3,610,000 | 4,517,000 | 348,000 | 325,000 | 235,000 | 92,000 | 203,000 | 256,000 | 0 | 560,000 | 2,824,000 | 3,284,000 | |||||||||||||||||||||||
| Fair value of acquired intangible assets | 4,429,000 | 4,429,000 | ||||||||||||||||||||||||||||||||||
| Amortization period of definite-lived intangible asset | 5 years | 5 years | ||||||||||||||||||||||||||||||||||
| Number of definite lived permit | 1 | 1 | ||||||||||||||||||||||||||||||||||
| Permit capitalized amount | 545,000 | |||||||||||||||||||||||||||||||||||
| Amortization period of permit (in years) | 10 years | 10 years | ||||||||||||||||||||||||||||||||||
| Changes in the carrying amount of permits [Abstract] | ||||||||||||||||||||||||||||||||||||
| Beginning balance | 16,854,000 | 16,854,000 | 16,863,000 | |||||||||||||||||||||||||||||||||
| PCB permit amortized | (55,000) | (55,000) | ||||||||||||||||||||||||||||||||||
| Permits in progress | 46,000 | |||||||||||||||||||||||||||||||||||
| Ending balance | 16,799,000 | 16,799,000 | 16,854,000 | 16,863,000 | ||||||||||||||||||||||||||||||||
| Definite lived intangible assets future amortization expense [Abstract] | ||||||||||||||||||||||||||||||||||||
| 2013 | 645,000 | 645,000 | ||||||||||||||||||||||||||||||||||
| 2014 | 602,000 | 602,000 | ||||||||||||||||||||||||||||||||||
| 2015 | 506,000 | 506,000 | ||||||||||||||||||||||||||||||||||
| 2016 | 429,000 | 429,000 | ||||||||||||||||||||||||||||||||||
| 2017 | 354,000 | 354,000 | ||||||||||||||||||||||||||||||||||
| Total | 2,536,000 | 2,536,000 | ||||||||||||||||||||||||||||||||||
| Amortization expense of intangible assets | $ 675,000 | $ 241,000 | $ 79,000 | |||||||||||||||||||||||||||||||||
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