STOCK PLANS AND STOCK BASED COMPENSATION - Restricted Stock Awards (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended					9 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Sep. 30, 2015	Jun. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Stock-based compensation
Closing price of common stock (in dollars per share)	$ 21.89		$ 19.89			$ 21.89
Shares of common stock granted	17,976		358,000
Shares
Granted (in shares)	17,976		358,000
Additional disclosures
Compensation expense	$ 103			$ 70		$ 282	$ 230
Restricted stock
Stock-based compensation
Shares of common stock granted						40,152
Shares
Nonvested at the beginning of the period (in shares)			101,631			101,631
Granted (in shares)						40,152
Vested (in shares)						(30,048)
Forfeited (in shares)						(500)
Nonvested at the end of the period (in shares)	111,235					111,235
Weighted Average Grant Date Fair Value
Nonvested at the beginning of the period (in dollars per share)			$ 16.57			$ 16.57
Granted (in dollars per share)						21.91
Vested (in dollars per share)						13.75
Forfeited (in dollars per share)						16.55
Nonvested at the end of the period (in dollars per share)	$ 19.26					$ 19.26
Restricted stock | 2007 Stock Incentive Plan
Additional disclosures
Unrecognized compensation costs	$ 1,089					$ 1,089
Compensation expense	$ 160			143		$ 512	447
Weighted-average period of expected recognition of the cost						2 years 1 month 6 days
Restricted stock | Executive officer and other employees
Stock-based compensation
Vesting percentage of stock awards on third anniversary of grant date	100.00%					100.00%
Shares of common stock granted	16,000	24,152			28,955
Shares
Granted (in shares)	16,000	24,152			28,955
Weighted Average Grant Date Fair Value
Granted (in dollars per share)	$ 22.57	$ 21.47			$ 19.57
Performance units | Executive officer and other employees
Additional disclosures
Compensation expense				$ 27			$ 53
Performance units | Executive officers
Stock-based compensation
Shares of common stock granted		16,152		16,205
Shares
Granted (in shares)		16,152		16,205
Weighted Average Grant Date Fair Value
Granted (in dollars per share)		$ 21.41		$ 19.57
Additional disclosures
Unrecognized compensation costs	$ 447					$ 447
Compensation expense	$ 55					$ 137