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OTHER COMPREHENSIVE INCOME (LOSS) (Details 1) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Balance, beginning of period $ (3,092)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax $ 6,698us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax $ (3,967)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
Other comprehensive (loss) income before reclassifications 8,370us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax (7,885)us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax 9,471us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
Amounts reclassified from accumulated other comprehensive income (loss) (4,140)us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax (1,905)us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax 1,194us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
Net other comprehensive (loss) income during the period 4,230us-gaap_OtherComprehensiveIncomeLossNetOfTax (9,790)us-gaap_OtherComprehensiveIncomeLossNetOfTax 10,665us-gaap_OtherComprehensiveIncomeLossNetOfTax
Balance, end of period $ 1,138us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax $ (3,092)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax $ 6,698us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax