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Derivative Instruments (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Effects of derivative instruments |  |  |
Amount of Gain Recognized in OCI on Derivatives (Effective Portion) | $ (796,000) | $ (499,000) | $ 1,298,000
Parent Company |  |  |
Effects of derivative instruments |  |  |
Amount of Gain Recognized in OCI on Derivatives (Effective Portion) | 796,000 | 499,000 | (1,298,000)
Cash Flow Hedging |  |  |
Effects of derivative instruments |  |  |
Amount of Gain Recognized in OCI on Derivatives (Effective Portion) |  |  | 1,690,000
Amount of Loss (Gain) Reclassified from Accumulated OCI into Income (Effective Portion) |  | (499,000) | 1,485,000
Significant ineffectiveness on held hedges | 0 | 0 | 0
Cash Flow Hedging | Interest expense Member |  |  |
Effects of derivative instruments |  |  |
Amount of Loss (Gain) Reclassified from Accumulated OCI into Income (Effective Portion) |  | (499,000) | 1,485,000
Cash Flow Hedging | Interest rate contracts |  |  |
Effects of derivative instruments |  |  |
Amount of Gain Recognized in OCI on Derivatives (Effective Portion) |  |  | 1,690,000
Amount of interest payments reclassified to income statement | $ 0 | $ 0 | $ 1,900,000

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- Definition The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959 + Details
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