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Income Taxes Tax Years Under Examination (Details)	12 Months Ended
	Dec. 31, 2018
Minimum [Member] | Federal
Income Tax Examination [Line Items]
Open Tax Year	2015
Minimum [Member] | California
Income Tax Examination [Line Items]
Open Tax Year	2014
Minimum [Member] | Arizona
Income Tax Examination [Line Items]
Open Tax Year	2014
Minimum [Member] | Tennessee
Income Tax Examination [Line Items]
Open Tax Year	2015
Minimum [Member] | Texas
Income Tax Examination [Line Items]
Open Tax Year	2014
Maximum [Member] | Federal
Income Tax Examination [Line Items]
Open Tax Year	2017
Maximum [Member] | California
Income Tax Examination [Line Items]
Open Tax Year	2017
Maximum [Member] | Arizona
Income Tax Examination [Line Items]
Open Tax Year	2016
Maximum [Member] | Tennessee
Income Tax Examination [Line Items]
Open Tax Year	2017
Maximum [Member] | Texas
Income Tax Examination [Line Items]
Open Tax Year	2017

X

- Definition

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+ References

No definition available.

+ Details

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- Definition

Tax year that remains open to examination under enacted tax laws, in CCYY format.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319

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