STOCK-BASED COMPENSATION (Details) (USD $)	3 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Weighted Average Grant Price [Roll Forward]
Stock compensation expense		$ 1,732,000	$ 1,440,000
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, 2014 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)	(834,459)	(49,300)
Number of shares forfeited (in shares)	120,067	11,158
Number of shares available for future grants (in shares)	85,608	85,608
Weighted-average grant price of granted shares (in dollars per share)	$ 27.66	$ 94.07
Restricted Stock [Roll Forward]
Non-vested, beginning balance (in shares)		211,510
Granted (in shares)	834,459	49,300
Forfeited (in shares)	(120,067)	(11,158)
Vested (in shares)		(39,026)
Nonvested, ending balance (in shares)	210,626	210,626
Weighted Average Grant Price [Roll Forward]
Non vested, beginning balance (in dollars per share)		$ 36.17
Granted (in dollars per share)	$ 27.66	$ 94.07
Forfeitures (in dollars per share)		$ 35.72
Vested (in dollars per share)		$ 36.88
Nonvested, ending balance (in dollars per share)	$ 49.54	$ 49.54
Stock compensation expense		1,732,000	1,440,000
Related income tax benefits recognized		700,000	600,000
Unrecognized compensation expense	$ 8,600,000	$ 8,600,000		$ 5,700,000
Compensation cost not yet recognized, Period for recognition	29 months 27 days