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QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
QUARTERLY FINANCIAL INFORMATION (UNAUDITED)                      
Revenues from continuing operations $ 65,252us-gaap_Revenues $ 63,117us-gaap_Revenues $ 65,187us-gaap_Revenues $ 62,597us-gaap_Revenues $ 60,180us-gaap_Revenues $ 57,487us-gaap_Revenues $ 59,838us-gaap_Revenues $ 58,308us-gaap_Revenues $ 256,153us-gaap_Revenues $ 235,813us-gaap_Revenues $ 232,513us-gaap_Revenues
Bargain purchase gain       4,918us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount         4,918us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount    
Income (loss) from continuing operations (3,469)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest 975us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest 4,170us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest 10,284us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest 2,290us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest 1,759us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest 4,808us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest 5,822us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest 11,960us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest 14,679us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest 19,797us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Income from operations of assets held for sale 4,056us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax 3,305us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax 4,344us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax 933us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax         12,638us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax    
Net income 587us-gaap_ProfitLoss 4,280us-gaap_ProfitLoss 8,514us-gaap_ProfitLoss 11,217us-gaap_ProfitLoss 2,290us-gaap_ProfitLoss 1,759us-gaap_ProfitLoss 4,808us-gaap_ProfitLoss 5,822us-gaap_ProfitLoss 24,598us-gaap_ProfitLoss 14,679us-gaap_ProfitLoss 19,797us-gaap_ProfitLoss
Net income attributable to stockholders 475us-gaap_NetIncomeLoss 4,285us-gaap_NetIncomeLoss 8,399us-gaap_NetIncomeLoss 11,219us-gaap_NetIncomeLoss 2,180us-gaap_NetIncomeLoss 1,765us-gaap_NetIncomeLoss 4,695us-gaap_NetIncomeLoss 5,826us-gaap_NetIncomeLoss 24,378us-gaap_NetIncomeLoss 14,466us-gaap_NetIncomeLoss 19,589us-gaap_NetIncomeLoss
Comprehensive income $ 475us-gaap_ComprehensiveIncomeNetOfTax $ 4,285us-gaap_ComprehensiveIncomeNetOfTax $ 8,399us-gaap_ComprehensiveIncomeNetOfTax $ 11,219us-gaap_ComprehensiveIncomeNetOfTax $ 2,180us-gaap_ComprehensiveIncomeNetOfTax $ 1,765us-gaap_ComprehensiveIncomeNetOfTax $ 4,695us-gaap_ComprehensiveIncomeNetOfTax $ 5,826us-gaap_ComprehensiveIncomeNetOfTax $ 24,378us-gaap_ComprehensiveIncomeNetOfTax $ 14,466us-gaap_ComprehensiveIncomeNetOfTax $ 19,589us-gaap_ComprehensiveIncomeNetOfTax
BASIC INCOME PER SHARE:                      
Continuing operations $ (0.04)us-gaap_IncomeLossFromContinuingOperationsPerBasicShare $ 0.01us-gaap_IncomeLossFromContinuingOperationsPerBasicShare $ 0.04us-gaap_IncomeLossFromContinuingOperationsPerBasicShare $ 0.11us-gaap_IncomeLossFromContinuingOperationsPerBasicShare $ 0.02us-gaap_IncomeLossFromContinuingOperationsPerBasicShare $ 0.02us-gaap_IncomeLossFromContinuingOperationsPerBasicShare $ 0.05us-gaap_IncomeLossFromContinuingOperationsPerBasicShare $ 0.06us-gaap_IncomeLossFromContinuingOperationsPerBasicShare $ 0.12us-gaap_IncomeLossFromContinuingOperationsPerBasicShare $ 0.15us-gaap_IncomeLossFromContinuingOperationsPerBasicShare $ 0.21us-gaap_IncomeLossFromContinuingOperationsPerBasicShare
Discontinued operations $ 0.04us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare $ 0.03us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare $ 0.05us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare $ 0.01us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare         $ 0.13us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare    
Net income   $ 0.04us-gaap_EarningsPerShareBasic $ 0.09us-gaap_EarningsPerShareBasic $ 0.12us-gaap_EarningsPerShareBasic $ 0.02us-gaap_EarningsPerShareBasic $ 0.02us-gaap_EarningsPerShareBasic $ 0.05us-gaap_EarningsPerShareBasic $ 0.06us-gaap_EarningsPerShareBasic $ 0.25us-gaap_EarningsPerShareBasic $ 0.15us-gaap_EarningsPerShareBasic $ 0.21us-gaap_EarningsPerShareBasic
DILUTED NET INCOME PER SHARE:                      
Continuing operations $ (0.04)us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare $ 0.01us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare $ 0.04us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare $ 0.11us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare $ 0.02us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare $ 0.02us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare $ 0.05us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare $ 0.06us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare $ 0.12us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare $ 0.15us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare $ 0.21us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare
Discontinued operations $ 0.04us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare $ 0.03us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare $ 0.05us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare $ 0.01us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare         $ 0.13us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare    
Net income   $ 0.04us-gaap_EarningsPerShareDiluted $ 0.09us-gaap_EarningsPerShareDiluted $ 0.12us-gaap_EarningsPerShareDiluted $ 0.02us-gaap_EarningsPerShareDiluted $ 0.02us-gaap_EarningsPerShareDiluted $ 0.05us-gaap_EarningsPerShareDiluted $ 0.06us-gaap_EarningsPerShareDiluted $ 0.25us-gaap_EarningsPerShareDiluted $ 0.15us-gaap_EarningsPerShareDiluted $ 0.21us-gaap_EarningsPerShareDiluted
Weighted average common shares outstanding - basic 97,582us-gaap_WeightedAverageNumberOfSharesIssuedBasic 97,582us-gaap_WeightedAverageNumberOfSharesIssuedBasic 97,571us-gaap_WeightedAverageNumberOfSharesIssuedBasic 95,934us-gaap_WeightedAverageNumberOfSharesIssuedBasic 95,440us-gaap_WeightedAverageNumberOfSharesIssuedBasic 95,440us-gaap_WeightedAverageNumberOfSharesIssuedBasic 95,440us-gaap_WeightedAverageNumberOfSharesIssuedBasic 95,440us-gaap_WeightedAverageNumberOfSharesIssuedBasic 97,173us-gaap_WeightedAverageNumberOfSharesIssuedBasic 95,440us-gaap_WeightedAverageNumberOfSharesIssuedBasic 95,440us-gaap_WeightedAverageNumberOfSharesIssuedBasic
Weighted average common shares outstanding - diluted 97,583us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 97,583us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 97,576us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 95,936us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 95,440us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 95,440us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 95,440us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 95,440us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 97,176us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 95,440us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 95,440us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding