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Consolidated Statements Of Cash Flows (Parenthetical) - Convertible Notes [Member] | Dec. 31, 2019 | Dec. 31, 2018
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3.25% Convertible Notes Due 2019 [Member] |  |
Debt Instrument [Line Items] |  |
Interest rate, stated percentage | 3.25% | 3.25%
3.25% Convertible Notes Due 2018 [Member] |  |
Debt Instrument [Line Items] |  |
Interest rate, stated percentage |  | 3.25%

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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