PROPERTY AND EQUIPMENT Narrative (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Leasehold Improvements	May 31, 2012 Leasehold Improvements	Dec. 31, 2011 Leasehold Improvements
Property, Plant and Equipment [Line Items]
Depreciation expense charged to operations	$ 4,369	$ 2,082	$ 760
Leasehold improvements	$ 30,964	$ 11,864		$ 12,289	$ 8,000	$ 1,459