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New Accounting Pronouncements (Narrative) (Details) - USD ($) $ in Thousands | Jan. 01, 2019 | Jun. 30, 2019
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New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |  |
Lease liabilities |  | $ 678,413
ASU 2017-08 [Member] |  |
New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |  |
Cumulative adjustments for accounting changes | $ 4,400 |
ASU 2016-02 [Member] |  |
New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |  |
Cumulative adjustments for accounting changes | 6,400 |
Right-of-use assets | $ 670,000 |
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] | us-gaap:PropertyPlantAndEquipmentNet |
Lease liabilities | $ 670,000 |
Operating Lease, Liability, Statement of Financial Position [Extensible List] | us-gaap:AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent |

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- Definition Amount of the cumulative effect on retained earnings net of related income tax effect. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22663-107794 + Details
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- Definition Present value of lessee's discounted obligation for lease payments from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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- Definition Indicates line item in statement of financial position that includes operating lease liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918631-209977 + Details
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- Definition Amount of lessee's right to use underlying asset under operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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