Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21521-112644

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21506-112644

Reference 3: 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)(5))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
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-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644

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Derivative Financial Instruments (Conversion rate swap agreement narrative) (Details 4)	Jun. 28, 2018	Jun. 27, 2018	Dec. 31, 2019 USD ($)	Jun. 30, 2019 USD ($)	Dec. 31, 2018 USD ($)
Derivative [Line Items]
Liability Derivatives			$ 6,377,000		$ 9,747,000
Visa Class B Restricted Securities
Derivative [Line Items]
Debt Instrument, Convertible, Conversion Ratio	1.6298	1.6483
Visa Conversion Rate Swap Agreement [Member]
Derivative [Line Items]
Liability Derivatives				$ 1,000,000.0
Visa Class B Restricted Securities
Derivative [Line Items]
Liability Derivatives			$ 0