STOCK-BASED COMPENSATION (Details) (USD $)	3 Months Ended		6 Months Ended			6 Months Ended	3 Months Ended	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Mar. 04, 2013 2013 Plan	Jun. 30, 2013 Restricted stock units	Jun. 30, 2013 Restricted stock units 2013 Plan	Jun. 30, 2013 Restricted stock units 2013 Plan
Stock-based compensation
Maximum shares authorized for issuance					2,500,000
Granted (in shares)								2,000,000
Vesting period								4 years
Shares granted during the period with approved performance criteria for 2013							676,690	676,690
Weighted average per unit grant date fair value (in dollars per share)							$ 10.55	$ 10.55
Stock-based compensation expense recognized	$ 1,300,000	$ 710,000	$ 2,638,000	$ 3,621,000			$ 1,200,000	$ 1,200,000
Compensation cost related to unvested granted awards not yet recognized						$ 20,000,000
Weighted average period of recognition of unrecognized compensation cost related to nonvested awards						3 years 9 months 18 days