STOCK-BASED COMPENSATION, Stock Options (Details) (USD $)	12 Months Ended
	Dec. 31, 2013
Stock Options [Member]
Stock option activity [Roll Forward]
Outstanding at January 1 (in shares)	828,230
Granted (in shares)	0
Exercised (in shares)	(252,081)
Forfeited (in shares)	0
Cancelled (in shares)	(5,666)
Outstanding at December 31 (in shares)	570,483
Stock option activity, additional disclosures [Abstract]
Outstanding at January 1, Weighted average exercise price (in dollars per share)	$ 11.58
Granted, Weighted average exercise price (in dollars per share)	$ 0.00
Exercised, Weighted average exercise price (in dollars per share)	$ 14.22
Forfeited, Weighted average exercise price (in dollars per share)	$ 0.00
Cancelled, Weighted average exercise price (in dollars per share)	$ 7.39
Outstanding at December 31, Weighted average exercise price (in dollars per share)	$ 10.43
Stock option activity, vested and expected to vest [Abstract]
Vested and expected to vest (in shares)	570,483
Exercisable at December 31 (in shares)	570,483
Vested and expected to vest, Weighted average exercise price (in dollars per share)	$ 10.43
Exercisable, Weighted average exercise price (in dollars per share)	$ 10.43
Stock Options [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration term (in years)	10 years
Equity Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)	8,000,000
Number of shares available for grant (in shares)	1,301,170