STOCK-BASED AWARDS (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Stock-Based Awards
Total stock-based compensation expense (in dollars)	$ 998	$ 809	$ 2,949	$ 2,377
Units
Outstanding-end of period (in shares)	582,075		582,075
Restricted stock awards
Stock-Based Awards
Total stock-based compensation expense (in dollars)	$ 1,000	$ 809	$ 2,900	$ 2,400
Vesting period			3 years
Units
Outstanding-beginning of year (in shares)			704,000
Granted at fair value (in shares)	0		233,000
Vested (in shares)			(301,000)
Forfeited (in shares)			(54,000)
Outstanding-end of period (in shares)	582,000		582,000
Weighted Average Grant Date Fair Value
Outstanding-beginning of year (in dollars per share)			$ 10.79
Granted at fair value (in dollars per share)	$ 0.00		$ 28.44
Vested (in dollars per share)			$ 11.87
Forfeited (in dollars per share)			$ 16.75
Outstanding-end of period (in dollars per share)	$ 16.71		$ 16.71
Restricted stock awards | First year
Stock-Based Awards
Annual award vesting percentage			33.30%
Restricted stock awards | Second year
Stock-Based Awards
Annual award vesting percentage			33.30%
Restricted stock awards | Third year
Stock-Based Awards
Annual award vesting percentage			33.30%