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Derivative Financial Instruments (Schedule of Notional Amounts and Fair Values of Derivatives Outstanding) (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
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Derivative [Line Items] |  |
Derivative assets, Fair Value | $ 37,187 | $ 18,965
Derivative liabilities, Fair Value |  | 21
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Cash Flow Hedging [Member] |  |
Derivative [Line Items] |  |
Derivative assets, Notional Amount | 425,612 |
Derivative assets, Fair Value | 6,825 |
Derivative liabilities, Notional Amount |  | 23,223
Derivative liabilities, Fair Value |  | 21
Nondesignated [Member] | Interest Rate Cap [Member] |  |
Derivative [Line Items] |  |
Derivative assets, Notional Amount | 2,911,220 | 2,194,210
Derivative assets, Fair Value | $ 30,362 | $ 18,965

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- Definition Fair value as of the balance sheet date of interest rate derivative assets, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13433-108611 + Details
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