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v3.19.1

Derivatives (Narrative) (Details) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2019 USD ($) item | Mar. 31, 2018 USD ($) | Dec. 31, 2018 USD ($)
Derivative [Line Items] |  |  |
Notional amount of derivatives | $ 3,141,363 |  | $ 3,024,565
Fair value liability | 6,900 |  | 7,300
Derivatives Designated as Hedging Instruments [Member] |  |  |
Derivative [Line Items] |  |  |
Notional amount of derivatives | 1,363,110 |  | 1,358,110
Interest Rate Swaps [Member] | Derivatives Designated as Hedging Instruments [Member] | Cash Flow Hedge [Member] |  |  |
Derivative [Line Items] |  |  |
Notional amount of derivatives | 975,000 |  | $ 875,000
Termination fees | 10,600 |  |
Amortization of accumulated other comprehensive loss on terminated cash flow hedges | $ 1,400 | $ 1,000 |
Interest Rate Swaps [Member] | Derivatives Designated as Hedging Instruments [Member] | Cash Flow Hedge [Member] | Swap Agreement One To Five [Member] |  |  |
Derivative [Line Items] |  |  |
Number of interest rate swap agreements | item | 5 |  |
Number of interest rate swap terminated | item | 5 |  |
Notional amount of derivatives | $ 450,000 | $ 450,000 |
Interest Rate Swaps [Member] | Derivatives Designated as Hedging Instruments [Member] | Cash Flow Hedge [Member] | Swap Agreement 1, Expires 2022 [Member] |  |  |
Derivative [Line Items] |  |  |
Notional amount of derivatives | $ 475,000 |  |
Derivative maturity expiration year | 2022 |  |
Interest Rate Swaps [Member] | Derivatives Designated as Hedging Instruments [Member] | Cash Flow Hedge [Member] | Swap Agreement 2, Expires 2023 [Member] |  |  |
Derivative [Line Items] |  |  |
Notional amount of derivatives | $ 350,000 |  |
Derivative maturity expiration year | 2023 |  |
Interest Rate Swaps [Member] | Derivatives Designated as Hedging Instruments [Member] | Cash Flow Hedge [Member] | Swap Agreement 3, Expires 2024 [Member] |  |  |
Derivative [Line Items] |  |  |
Notional amount of derivatives | $ 100,000 |  |
Derivative maturity expiration year | 2024 |  |

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Fair value of financial and nonfinancial obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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