Schedule II: Valuation and Qualifying Accounts (Tables)  | 
12 Months Ended | ||||||||||||||||||||
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Dec. 31, 2019  | |||||||||||||||||||||
| SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] | |||||||||||||||||||||
| Schedule II: Valuation and Qualifying Accounts | 
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- References No definition available. 
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| X | ||||||||||
- References No definition available. 
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