DISCONTINUED OPERATIONS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended		0 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended
	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 02, 2011 2007 Credit Agreements	Sep. 02, 2011 QA business	Sep. 30, 2012 QA business	Dec. 31, 2011 QA business	Sep. 30, 2012 QA business	Aug. 16, 2011 QA business	Sep. 30, 2012 QA business Income tax benefit to discontinued operations, out of period adjustment
Discontinued operations
Sale price									$ 275,000
Total net cash proceeds					283,376		2,727
Estimated cash assumed					8,376
Repayment of debt				237,732
Write-off of remaining unamortized deferred financing costs		143	844	3,586
Income tax benefit from final taxable gain recorded to discontinued operations						4,246
Operating results
Income tax benefit, prior period adjustment										1,629
Income tax benefit	$ 4,246		$ 4,246			$ 4,246		$ 4,246