Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
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Fixed interest rate related to the interest rate derivative.

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The amount of gain reclassified into earnings in the period when cash flow hedge is discontinued because it is probable that the original forecasted transactions will not occur by the end of the original period or an additional two month time period.

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The estimated net amount of unrealized gains or losses on interest rate cash flow hedges as of the balance sheet date expected to be reclassified to earnings within the next twelve months.

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Number of interest rate derivative instruments held by the entity at the reporting date.

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The cash inflow provided by derivative instruments during the period, which are classified as financing activities, excluding those designated as hedging instruments.

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Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.

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Number of Interest Rate Derivatives Terminated

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Derivatives And Hedging (Narrative) (Details) $ in Thousands		12 Months Ended
	Jun. 24, 2016 USD ($) derivative_contract	Dec. 31, 2018 USD ($) derivative_contract	Dec. 31, 2017 USD ($) derivative_contract	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Derivatives, Fair Value [Line Items]
Accumulated other comprehensive loss		$ 1,750,699	$ 1,809,842	$ 1,716,896	$ 1,545,010
Interest Rate Contracts [Member] \| Cash Flow Hedging [Member]
Derivatives, Fair Value [Line Items]
Number of interest rate contracts \| derivative_contract		0	3
Notional amount of interest rate fair value hedge derivatives		$ 200,000	$ 200,000
Gain due to the probability that the related hedged forecasted transactions would no longer occur		3,400
Derivative, fixed interest rate			1.50%
Cash flow hedge gain (loss) to be amortized within 12 months		$ 900
Number of interest rate derivatives terminated \| derivative_contract		3
Interest Rate Contracts [Member] \| Fair Value Hedging [Member]
Derivatives, Fair Value [Line Items]
Notional amount of interest rate fair value hedge derivatives	$ 62,900
Number of interest rate derivatives terminated \| derivative_contract	2
Proceeds from extinguishment of derivative instrument	$ 2,200
Gain on Cash Flow Hedges
Derivatives, Fair Value [Line Items]
Accumulated other comprehensive loss		$ 4,501	$ 7,424