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Equity - Schedule of Changes in AOCI (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]  
Gains and Losses on Cash Flow Hedges, Beginning $ 4,439us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax
Other comprehensive income (loss) before reclassifications (9,560)us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
Amounts of loss reclassified from accumulated other comprehensive loss to interest expense 5,525us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax
Gains and Losses on Cash Flow Hedges, Ending $ 404us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax