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Fair Value Measurements and Derivative Instruments (Income Statement Hedging Instruments) (Details) - Fair value hedging - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
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Mar. 31, 2016 | Dec. 31, 2018 | Dec. 31, 2017
Effect of derivative instruments involved in fair value hedging on the consolidated financial statements |  |  |
Amount of Gain (Loss) Recognized in Income on Derivative | $ 3,863 | $ (8,854) | $ (132)
Amount of Gain (Loss) Recognized in Income on Hedged Item | 12,275 | 4,673 | 6,065
Interest rate swaps | Interest expense, net of interest capitalized |  |  |
Effect of derivative instruments involved in fair value hedging on the consolidated financial statements |  |  |
Amount of Gain (Loss) Recognized in Income on Derivative | 7,488 | (8,854) | 3,007
Amount of Gain (Loss) Recognized in Income on Hedged Item | 7,203 | 4,673 | 0
Interest rate swaps | Other income (expense) |  |  |
Effect of derivative instruments involved in fair value hedging on the consolidated financial statements |  |  |
Amount of Gain (Loss) Recognized in Income on Derivative | (3,625) | 0 | (3,139)
Amount of Gain (Loss) Recognized in Income on Hedged Item | $ 5,072 | $ 0 | $ 6,065

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- Definition Amount of gain (loss) from the increase (decrease) in fair value of derivative and nonderivative instruments designated as fair value hedging instruments recognized in the income statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=109977999&loc=d3e76258-113986 + Details
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- Definition Amount of the increase (decrease) in fair value of the hedged item in a fair value hedge recognized in the income statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=109977999&loc=d3e76258-113986 + Details
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