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EARNINGS PER SHARE (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2015 | Mar. 31, 2014
Earnings Per Share by Two Class Method [Line Items] |  |
Potential common shares outstanding which would have had a dilutive effect on earnings per share (in shares) | 0 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount | 0 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Numerator [Abstract] |  |
Net earnings available to common stockholders | $ 5,568 us-gaap_NetIncomeLoss | $ 2,503 us-gaap_NetIncomeLoss
Undistributed earnings | 4,759 us-gaap_UndistributedEarnings | 1,719 us-gaap_UndistributedEarnings
Undistributed earnings allocation - basic and diluted [Abstract] |  |
Total undistributed earnings | 4,759 us-gaap_UndistributedEarningsDiluted | 1,719 us-gaap_UndistributedEarningsDiluted
Net earnings allocation basic and diluted [Abstract] |  |
Net earnings available to common stockholders | 5,568 us-gaap_NetIncomeLoss | 2,503 us-gaap_NetIncomeLoss
Class A [Member] |  |
Numerator [Abstract] |  |
Net earnings available to common stockholders | 970 us-gaap_NetIncomeLoss / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 442 us-gaap_NetIncomeLoss / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Less Dividends declared: | 131 us-gaap_DividendsCommonStockCash / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 130 us-gaap_DividendsCommonStockCash / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Undistributed earnings allocation - basic and diluted [Abstract] |  |
Total undistributed earnings | 839 us-gaap_UndistributedEarningsDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 312 us-gaap_UndistributedEarningsDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Net earnings allocation basic and diluted [Abstract] |  |
Net earnings available to common stockholders | 970 us-gaap_NetIncomeLoss / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 442 us-gaap_NetIncomeLoss / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Weighted-average number of shares outstanding: |  |
Common share - basic and diluted (in shares) | 2,175 us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 2,175 us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Earnings per share [Abstract] |  |
Common share - basic and diluted (in dollars per share) | $ 0.45 us-gaap_EarningsPerShareBasicAndDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | $ 0.20 us-gaap_EarningsPerShareBasicAndDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Class B [Member] |  |
Numerator [Abstract] |  |
Net earnings available to common stockholders | 4,598 us-gaap_NetIncomeLoss / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 2,061 us-gaap_NetIncomeLoss / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Less Dividends declared: | 678 us-gaap_DividendsCommonStockCash / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 654 us-gaap_DividendsCommonStockCash / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Undistributed earnings allocation - basic and diluted [Abstract] |  |
Total undistributed earnings | 3,920 us-gaap_UndistributedEarningsDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 1,407 us-gaap_UndistributedEarningsDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Net earnings allocation basic and diluted [Abstract] |  |
Net earnings available to common stockholders | $ 4,598 us-gaap_NetIncomeLoss / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | $ 2,061 us-gaap_NetIncomeLoss / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Weighted-average number of shares outstanding: |  |
Common share - basic and diluted (in shares) | 9,670 us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 9,335 us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Earnings per share [Abstract] |  |
Common share - basic and diluted (in dollars per share) | $ 0.48 us-gaap_EarningsPerShareBasicAndDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | $ 0.22 us-gaap_EarningsPerShareBasicAndDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember

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