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Derivatives and Hedging Activities (Fair Values of Derivative Instruments on Condensed Consolidated Balance Sheet) (Details) - USD ($) | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Other Assets |  |
Derivatives, Fair Value [Line Items] |  |
Asset Derivatives, Fair Value | $ 2,364,000 | $ 6,000
Interest Rate Swap |  |
Derivatives, Fair Value [Line Items] |  |
Liability Derivatives, Fair Value | 7,562,000 | 10,358,000
Parent Company [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Asset Derivatives, Fair Value | 2,364,000,000 | 6,000
Liability Derivatives, Fair Value | $ 7,562,000 | $ 10,358,000

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