EMPLOYEE BENEFIT PLANS, STOCK OPTIONS BY EXERCISE PRICE RANGE (Details) (USD $)	12 Months Ended
	Dec. 31, 2013
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, End of Period [Abstract]
Outstanding Options, Amount ( in shares)	1,615,771
Outstanding Options, Weighted Average Remaining Contractual Years Remaining	2 years 1 month 6 days
Vested Options, Amount ( in shares)	1,563,493
Vested Options, Weighted Average Contractual Years Remaining	2 years
Exercise Price $8.34 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, End of Period [Abstract]
Outstanding Options, Exercise Prices (in dollars per share)	$ 8.34
Outstanding Options, Amount ( in shares)	24,582
Outstanding Options, Weighted Average Remaining Contractual Years Remaining	5 years 3 months 18 days
Vested Options, Amount ( in shares)	24,582
Vested Options, Weighted Average Contractual Years Remaining	5 years 3 months 18 days
Exercise Price $12.75 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, End of Period [Abstract]
Outstanding Options, Exercise Prices (in dollars per share)	$ 12.75
Outstanding Options, Amount ( in shares)	39,589
Outstanding Options, Weighted Average Remaining Contractual Years Remaining	6 years 3 months 18 days
Vested Options, Amount ( in shares)	25,856
Vested Options, Weighted Average Contractual Years Remaining	6 years 3 months 18 days
Exercise Price $13.74 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, End of Period [Abstract]
Outstanding Options, Exercise Prices (in dollars per share)	$ 13.74
Outstanding Options, Amount ( in shares)	370,062
Outstanding Options, Weighted Average Remaining Contractual Years Remaining	3 years 3 months 18 days
Vested Options, Amount ( in shares)	370,062
Vested Options, Weighted Average Contractual Years Remaining	3 years 3 months 18 days
Exercise Price $15.10 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, End of Period [Abstract]
Outstanding Options, Exercise Prices (in dollars per share)	$ 15.10
Outstanding Options, Amount ( in shares)	257,579
Outstanding Options, Weighted Average Remaining Contractual Years Remaining	1 year 4 months 24 days
Vested Options, Amount ( in shares)	257,579
Vested Options, Weighted Average Contractual Years Remaining	1 year 4 months 24 days
Exercise Price $15.46 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, End of Period [Abstract]
Outstanding Options, Exercise Prices (in dollars per share)	$ 15.46
Outstanding Options, Amount ( in shares)	85,183
Outstanding Options, Weighted Average Remaining Contractual Years Remaining	7 years 3 months 18 days
Vested Options, Amount ( in shares)	46,638
Vested Options, Weighted Average Contractual Years Remaining	7 years 3 months 18 days
Exercise Price $16.45 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, End of Period [Abstract]
Outstanding Options, Exercise Prices (in dollars per share)	$ 16.45
Outstanding Options, Amount ( in shares)	76,320
Outstanding Options, Weighted Average Remaining Contractual Years Remaining	1 year 1 month 6 days
Vested Options, Amount ( in shares)	76,320
Vested Options, Weighted Average Contractual Years Remaining	1 year 1 month 6 days
Exercise Price $16.73 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, End of Period [Abstract]
Outstanding Options, Exercise Prices (in dollars per share)	$ 16.73
Outstanding Options, Amount ( in shares)	46,453
Outstanding Options, Weighted Average Remaining Contractual Years Remaining	4 years 7 months 6 days
Vested Options, Amount ( in shares)	46,453
Vested Options, Weighted Average Contractual Years Remaining	4 years 7 months 6 days
Exercise Price $18.18 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, End of Period [Abstract]
Outstanding Options, Exercise Prices (in dollars per share)	$ 18.18
Outstanding Options, Amount ( in shares)	80,000
Outstanding Options, Weighted Average Remaining Contractual Years Remaining	4 years 4 months 24 days
Vested Options, Amount ( in shares)	80,000
Vested Options, Weighted Average Contractual Years Remaining	4 years 4 months 24 days
Exercise Price $19.90 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, End of Period [Abstract]
Outstanding Options, Exercise Prices (in dollars per share)	$ 19.90
Outstanding Options, Amount ( in shares)	618,895
Outstanding Options, Weighted Average Remaining Contractual Years Remaining	0 years 1 month 6 days
Vested Options, Amount ( in shares)	618,895
Vested Options, Weighted Average Contractual Years Remaining	0 years 1 month 6 days
Exercise Price $13.86 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, End of Period [Abstract]
Outstanding Options, Exercise Prices (in dollars per share)	$ 13.86
Outstanding Options, Amount ( in shares)	17,108
Outstanding Options, Weighted Average Remaining Contractual Years Remaining	8 years 3 months 18 days
Vested Options, Amount ( in shares)	17,108
Vested Options, Weighted Average Contractual Years Remaining	8 years 3 months 18 days