STOCK-BASED COMPENSATION (Details) (USD $)	6 Months Ended		84 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Dec. 31, 2011
Weighted Average Grant Price [Roll Forward]
Stock compensation expense	$ 954,000	$ 601,000
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights	The shares of restricted stock granted to employees and that are outstanding as of June 30, 2012 vest in accordance with one of the following vesting schedules: 100% one year after date of grant; 33.3% each year for three years after date of grant; 20% each year for five years after the grant date; or 10% each year for ten years after the grant date.
Numerator used for calculating the number of whole shares granted	75,000
Award vesting period	1 year
Number of shares authorized for grants (in shares)	800,000		800,000
Number of shares granted (in shares)	(36,496)		(648,450)
Number of shares forfeited (n shares)	4,209		64,947
Number of shares available for future grants (in shares)	216,497		216,497
Weighted average grant price of granted shares (in dollars per share)	$ 37.78		$ 18.35
Restricted Stock [Roll Forward]
Non-vested, beginning balance (in shares)	228,592
Granted (in shares)	36,496		648,450
Forfeited (in shares)	4,209		64,947
Vested (in shares)	30,690
Nonvested, ending balance (in shares)	230,189		230,189
Weighted Average Grant Price [Roll Forward]
Non vested, beginning balance (in dollars per share)	$ 21.10
Granted (in dollars per share)	$ 37.78		$ 18.35
Forfeitures (in dollars per share)	$ 21.06
Vested (in dollars per share)	$ 17.64
Nonvested, ending balance (in dollars per share)	$ 24.21		$ 24.21
Stock compensation expense	954,000	601,000
Unrecognized compensation expense	$ 4,477,000		$ 4,477,000	$ 4,051,000
Compensation cost not yet recognized, Period for recognition	30 months