EQUITY-BASED INCENTIVE AWARDS (Details 2) - USD ($)	1 Months Ended		3 Months Ended
	Oct. 31, 2015	Oct. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015
All Equity-Based Awards (stock options and restricted stock units)
Compensation expense related to the amortization of all equity - based compensation awards			$ 300,000	$ 300,000
Total unamortized compensation expense				$ 2,200,000	$ 2,300,000
Restricted Stock Units
Restricted stock units
Award outstanding at the end of the period (in shares)	29,977		29,977		28,567
Direct cost to the recipients of the restricted stock units			$ 0
Number of Shares
Nonvested restricted stock units at the beginning of the period (in shares)	29,977		29,977
Granted (in shares)			13,250
Vested (in shares)			(14,660)
Nonvested restricted stock units at the end of the period (in shares)			28,567
Weighted Average Fair Value
Nonvested restricted stock units at the beginning of the period (in dollars per share)	$ 80.00		$ 80.00
Granted (in dollars per share)			83.90
Vested (in dollars per share)			83.95
Nonvested restricted stock units at the end of the period (in dollars per share)			$ 80.35
Restricted Stock Units 1
Restricted stock units
Estimated fair value of award at grant date		$ 1,486,000
Award outstanding at the end of the period (in shares)			6,649		6,649
Fair value of non-vested awards at the end of the period					$ 534,000
Vested as of the balance sheet date (in shares)					10,951
Number of Shares
Granted (in shares)		17,600
Nonvested restricted stock units at the end of the period (in shares)			6,649
Restricted Stock Units 1 | Vesting of awards on the third anniversary from date of grant
Restricted stock units
Award outstanding at the end of the period (in shares)			4,669		4,669
Number of Shares
Nonvested restricted stock units at the end of the period (in shares)			4,669
Restricted Stock Units 1 | Vesting of awards equally on the third, fourth and fifth anniversaries from date of grant
Restricted stock units
Award outstanding at the end of the period (in shares)			1,980		1,980
Number of Shares
Nonvested restricted stock units at the end of the period (in shares)			1,980
Restricted Stock Units 1 | Minimum
Restricted stock units
Service period		36 months
Restricted Stock Units 1 | Maximum
Restricted stock units
Service period		60 months
Restricted Stock Units 2
Restricted stock units
Service period				36 months
Estimated fair value of award at grant date				$ 1,083,000
Award outstanding at the end of the period (in shares)			8,668		8,668
Fair value of non-vested awards at the end of the period					$ 696,000
Vested as of the balance sheet date (in shares)					4,332
Number of Shares
Granted (in shares)				13,000
Nonvested restricted stock units at the end of the period (in shares)			8,668
Restricted Stock Units 2 | Vesting of awards equally on the second and third anniversaries from date of grant
Restricted stock units
Award outstanding at the end of the period (in shares)			8,668		8,668
Number of Shares
Nonvested restricted stock units at the end of the period (in shares)			8,668
Restricted Stock Units 3
Restricted stock units
Estimated fair value of award at grant date	$ 1,112,000
Award outstanding at the end of the period (in shares)			13,250		13,250
Fair value of non-vested awards at the end of the period					$ 1,065,000
Number of Shares
Granted (in shares)	13,250
Nonvested restricted stock units at the end of the period (in shares)			13,250
Restricted Stock Units 3 | Vesting of awards equally in three anniversaries from the date of grant
Restricted stock units
Award outstanding at the end of the period (in shares)			13,000		13,000
Number of Shares
Nonvested restricted stock units at the end of the period (in shares)			13,000
Restricted Stock Units 3 | Vesting of awards equally in five anniversaries from the date of grant
Restricted stock units
Award outstanding at the end of the period (in shares)			250		250
Number of Shares
Nonvested restricted stock units at the end of the period (in shares)			250
Restricted Stock Units 3 | Minimum
Restricted stock units
Service period	36 months
Restricted Stock Units 3 | Maximum
Restricted stock units
Service period	60 months