STOCK COMPENSATION PLANS (Details) (USD $) | 3 Months Ended | |
Mar. 31, 2015 | Mar. 31, 2014 | 25-May-05 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] | | | |
Granted, option shares (in shares) | 0 | | |
Share Based Compensation Arrangement By Share Based Payment Award Nonvested Options Outstanding [Roll Forward] | | | |
Granted, option shares (in shares) | 0 | | |
Non-vested shares of Class A Stock under option [Abstract] | | | |
Vesting period for granted option (in years) | 1 year | | |
Options granted term (in years) | 10 years | | |
Weighted-average assumptions used for grants issued [Abstract] | | | |
Expected Dividend Yield (in hundredths) | 3.88% | 3.63% | |
Expected Stock Price Volatility (in hundredths) | 26.50% | 26.16% | |
Weighted Average Risk-Free Interest Rate (in hundredths) | 2.24% | 1.68% | |
Weighted Average Expected Life of Options (in years) | 7 years 6 months 7 days | 9 years 4 months 28 days | |
Unrecognized expense related to non-vested option shares | $13,000 | | |
Period over which unvested options cost will recognized (in years) | 0 years 1 month 6 days | | |
Class A Stock [Member] | 2005 Equity Compensation Plan [Member] | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | |
Number of shares authorizes for new issues | | | 500,000 |
Compensation expense | 33,000 | 34,000 | |
Class A Stock [Member] | Stock Options [Member] | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] | | | |
Outstanding at beginning of period, option shares (in shares) | 376,250 | | |
Granted, option shares (in shares) | 0 | | |
Exercised, option shares (in shares) | 0 | | |
Outstanding at end of period, option shares (in shares) | 376,250 | | |
Options exercisable at end of period, option share (in shares) | 342,500 | | |
Shares of Class A Non-Voting Common Stock under option [Abstract] | | | |
Outstanding at beginning of period, weighted average exercise price (in dollars per shares) | $19.52 | | |
Granted, weighted average exercise price (in dollars per shares) | $0 | | |
Exercised, weighted average exercise price (in dollars per shares) | $0 | | |
Outstanding at end of period, weighted average exercise price (in dollars per shares) | $19.52 | | |
Options exercisable at end of period, weighted average exercise price (in dollars per shares) | $19.29 | | |
Outstanding at end of period, weighted average remaining life (in years) | 4 years 2 months 26 days | | |
Options exercisable at end of period, weighted average remaining life (in years) | 3 years 9 months 4 days | | |
Options exercisable at beginning of period, aggregate intrinsic value | 1,157,000 | | |
Exercised, aggregate intrinsic value | 0 | | |
Outstanding at end of period, aggregate intrinsic value | 762,000 | | |
Options exercisable at end of period, aggregate intrinsic value | $762,000 | | |
Share Based Compensation Arrangement By Share Based Payment Award Nonvested Options Outstanding [Roll Forward] | | | |
Granted, option shares (in shares) | 0 | | |
Class A Stock [Member] | Non-Vested Stock Option [Member] | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] | | | |
Granted, option shares (in shares) | 0 | | |
Share Based Compensation Arrangement By Share Based Payment Award Nonvested Options Outstanding [Roll Forward] | | | |
Outstanding at beginning of period, Non-vested option shares (in shares) | 33,750 | | |
Granted, option shares (in shares) | 0 | | |
Vested, option shares (in shares) | 0 | | |
Canceled, option shares (in shares) | 0 | | |
Outstanding at end of period, Non-vested option shares (in shares) | 33,750 | | |
Non-vested shares of Class A Stock under option [Abstract] | | | |
Outstanding at beginning of period, weighted average grant - date fair value per option (in dollars per shares) | $3.95 | | |
Granted, weighted average grant - date fair value per option (in dollars per shares) | $0 | | |
Vested, weighted average grant - date fair value per option (in dollars per shares) | $0 | | |
Canceled, weighted average grant - date fair value per option (in dollars per shares) | $0 | | |
Outstanding at end of period, weighted average grant - date fair value per option (in dollars per shares) | $3.95 | | |