STOCK PLANS AND STOCK BASED COMPENSATION (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014	Dec. 31, 2014
STOCK PLANS AND STOCK BASED COMPENSATION
Number of shares available for grant permitted by plan	3,000,000
Information related to the stock option plan
Intrinsic value of options exercised		$ 7	$ 54	$ 26
Cash received from options exercised, net of shares redeemed		97	119	$ 117
Total fair value of options granted	$ 1,140		$ 1,140
Estimated unrecognized stock option and restricted stock award expense related to unvested options and awards (net of estimated forfeitures)
2015	292
2016	577
2017	547
2018	389
2019	159
2020	41
Total	$ 2,005
Class B Common Stock
STOCK PLANS AND STOCK BASED COMPENSATION
Number of shares available for grant permitted by plan	0
Class A Common Stock
STOCK PLANS AND STOCK BASED COMPENSATION
Number of options outstanding (in shares)	461,900		155,000	327,500	327,500	155,000
Options
Outstanding, beginning of year (in shares)			155,000	327,500	327,500
Granted (in shares)			317,900		1,000
Exercised (in shares)			(11,000)		(90,500)
Forfeited or expired (in shares)					(83,000)
Outstanding, end of year (in shares)	461,900		461,900		155,000
Fully vested and expected to vest (in shares)	461,900
Exercisable (vested) at end of year (in shares)	128,000
Weighted Average Exercise Price
Outstanding, beginning of year (in dollars per share)			$ 20.15	$ 20.03	$ 20.03
Granted (in dollars per share)			24.50		23.50
Exercised (in dollars per share)			18.99		19.78
Forfeited or expired (in dollars per share)					20.09
Outstanding, end of year (in dollars per share)	$ 23.18		$ 23.18		$ 20.15
Fully vested and expected to vest (in dollars per share)	23.18
Exercisable (vested) at end of year (in dollars per share)	$ 19.91
Weighted Average Remaining Contractual Term
Outstanding, end of year			3 years 10 months 24 days		1 year 1 month 21 days
Fully vested and expected to vest			3 years 10 months 24 days
Exercisable (vested) at end of year			5 months 1 day
Aggregate Intrinsic Value
Outstanding, end of year	$ 1,204,000					$ 710,000
Fully vested and expected to vest	1,204,000
Exercisable (vested) at end of year	753,000
Minimum
STOCK PLANS AND STOCK BASED COMPENSATION
Vesting period			3 years
Exercisable period			5 years
Maximum
STOCK PLANS AND STOCK BASED COMPENSATION
Exercisable period			6 years
Stock option
STOCK PLANS AND STOCK BASED COMPENSATION
Exercisable period			1 year
Information related to restricted stock awards granted
Expenses	51	(18)	$ 56	$ 13
Estimated unrecognized stock option and restricted stock award expense related to unvested options and awards (net of estimated forfeitures)
2015	140
2016	273
2017	269
2018	266
2019	147
2020	30
Total	$ 1,125
Restricted Stock Awards
Weighted Average Exercise Price
Outstanding, beginning of year (in dollars per share)			$ 19.85	$ 19.85	$ 19.85
Granted (in dollars per share)			25.19
Forfeited or expired (in dollars per share)					19.85
Outstanding, end of year (in dollars per share)	$ 20.01		$ 20.01		$ 19.85
Information related to restricted stock awards granted
Shares granted			2,500
Expenses	$ 74	$ 180	$ 147	$ 255
Shares
Outstanding, beginning of year (in shares)			80,500	87,000	87,000
Granted (in shares)			2,500
Outstanding, end of year (in shares)	83,000		83,000		80,500
Forfeited or expired (in shares)					(1,500)
Earned and issued (in shares)					(5,000)
Estimated unrecognized stock option and restricted stock award expense related to unvested options and awards (net of estimated forfeitures)
2015	$ 152
2016	304
2017	278
2018	123
2019	12
2020	11
Total	$ 880