CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (PARANTHETICAL) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Change in fair value of derivatives, tax	$ 4,704	$ 22,050	$ 50,307	$ 59,679
Derivative amounts reclassified to net income, tax	(3,038)	2,673	(3,360)	8,654
Change in retirement and other postretirement benefit plan obligations, tax	(1,064)	(737)	(3,192)	(2,172)
Other comprehensive income (loss) of unconsolidated affiliates, tax	$ (332)	$ 1,314	$ 3,015	$ 3,164

Other Comprehensive Income (Loss), Portion Attributable to Equity Method Investments, Tax

No definition available.

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- Definition

Amount, before reclassification, of tax expense (benefit) for gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=118930883&loc=d3e640-108580

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- Definition

Amount of tax expense (benefit) for reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

+ References

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- Definition

Amount, after reclassification adjustment, of tax (expense) benefit for (increase) decrease in accumulated other comprehensive income of defined benefit plan.

+ References

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-Publisher FASB
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-Topic 220
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