STOCK-BASED COMPENSATION (Details - RSA & RSU Rollforwards) (USD $)	3 Months Ended
	Mar. 31, 2014
RSUs
Nonvested RSUs, RSUs with a Market Condition, Restricted Stock and Restricted Stock with a Market Condition, Number of Shares
Nonvested at the beginning of the period (in shares)	599,122
Granted (in shares)	102,440
Vested (in shares)	(141,116)
Forfeited (in shares)	(10,371)
Nonvested at the end of the period (in shares)	550,075
Nonvested RSUs, RSUs with a Market Condition, Restricted Stock and Restricted Stock with a Market Condition, Weighted Average Grant Date Fair Value
Nonvested at the beginning of the period (in dollars per share)	$ 14.15
Granted (in dollars per share)	$ 33.59
Vested (in dollars per share)	$ 13.54
Forfeited (in dollars per share)	$ 16.44
Nonvested at the end of the period (in dollars per share)	$ 17.89
RSUs with a market condition
Nonvested RSUs, RSUs with a Market Condition, Restricted Stock and Restricted Stock with a Market Condition, Number of Shares
Nonvested at the beginning of the period (in shares)	0
Granted (in shares)	500
Nonvested at the end of the period (in shares)	500
Nonvested RSUs, RSUs with a Market Condition, Restricted Stock and Restricted Stock with a Market Condition, Weighted Average Grant Date Fair Value
Nonvested at the beginning of the period (in dollars per share)	$ 0.00
Granted (in dollars per share)	$ 33.59
Nonvested at the end of the period (in dollars per share)	$ 33.59
Restricted stock
Nonvested RSUs, RSUs with a Market Condition, Restricted Stock and Restricted Stock with a Market Condition, Number of Shares
Nonvested at the beginning of the period (in shares)	119,500
Vested (in shares)	(20,833)
Nonvested at the end of the period (in shares)	98,667
Nonvested RSUs, RSUs with a Market Condition, Restricted Stock and Restricted Stock with a Market Condition, Weighted Average Grant Date Fair Value
Nonvested at the beginning of the period (in dollars per share)	$ 22.47
Vested (in dollars per share)	$ 17.49
Nonvested at the end of the period (in dollars per share)	$ 23.53
Restricted stock with a market condition
Nonvested RSUs, RSUs with a Market Condition, Restricted Stock and Restricted Stock with a Market Condition, Number of Shares
Nonvested at the beginning of the period (in shares)	62,500
Vested (in shares)	(62,500)
Nonvested at the end of the period (in shares)	0
Nonvested RSUs, RSUs with a Market Condition, Restricted Stock and Restricted Stock with a Market Condition, Weighted Average Grant Date Fair Value
Nonvested at the beginning of the period (in dollars per share)	$ 13.93
Vested (in dollars per share)	$ 13.93
Nonvested at the end of the period (in dollars per share)	$ 0.00