BASIS OF PRESENTATION AND NATURE OF OPERATIONS (Details) (USD $) In Thousands, unless otherwise specified	0 Months Ended		8 Months Ended	12 Months Ended					0 Months Ended	12 Months Ended	0 Months Ended	3 Months Ended	12 Months Ended
	Dec. 31, 2012	Mar. 31, 2012	Sep. 02, 2011 segment	Dec. 31, 2013 segment	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Real property Subsidiary of UL	Dec. 31, 2011 Real property Subsidiary of UL	Sep. 02, 2011 2007 Credit Agreements	Dec. 31, 2011 2007 Credit Agreements	Sep. 02, 2011 QA business	Sep. 30, 2012 QA business	Dec. 31, 2012 QA business	Dec. 31, 2011 QA business
BASIS OF PRESENTATION AND NATURE OF OPERATIONS
Number of core businesses of the entity			2	1
Discontinued operations
Sale price received											$ 275,000
Gain on sale											14,071			14,071
Tax liability											105,934			105,934
Income tax benefit from final taxable gain recorded to discontinued operations												4,228	4,228
Repayment of debt									237,732
Write-off of remaining unamortized deferred financing costs				143	844	3,586			3,586	3,586
Property, plant and equipment, additional disclosures
Rental income generated per year							300
Impairment loss	$ 37,431	$ 0		$ 194	$ 37,431	$ 1,861		$ 1,861