STOCK-BASED COMPENSATION - Summary of company's Stock option plan (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Shares, Outstanding at the beginning of the period	102,100	102,100
Shares, Granted	17,700
Shares, Exercised	(97,100)
Shares, Outstanding at the end of the period	22,700	102,100
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Rollforward]
Outstanding at the beginning of the period, Weighted Average Exercise Price (in Dollars per share)	$ 4.99	$ 4.99
Weighted Average Exercise Price, Granted (in Dollars per share)	$ 18.35
Weighted Average Exercise Price, Exercises (in Dollars per share)	$ 5.00
Outstanding at the beginning of the period, Weighted Average Exercise Price (in Dollars per share)	$ 15.37	$ 4.99
Options exercisable at period-end	22,700	102,100
Weighted average fair value of options granted during the period	17,700	102,100
Aggregate intrinsic value of outstanding and exercisable options at the end of the period	22,700
Options exercisable at period-end (in Dollars per share)	$ 15.37	$ 4.99
Weighted average fair value of options granted during the period (in Dollars per share)	$ 18.35
Aggregate intrinsic value of outstanding and exercisable options at the end of the period (in dollars per share)	$ 2.63