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Short-term Debt Statement - USD ($)
$ in Millions
1 Months Ended 6 Months Ended 12 Months Ended
May 31, 2019
Feb. 28, 2019
Nov. 30, 2018
Jun. 30, 2019
Dec. 31, 2018
Debt Disclosure [Abstract]          
Short term borrowing limit     $ 40.0    
Short-term Debt [Line Items]          
Line of Credit Facility, Increase (Decrease), Net $ 55.0   $ 55.0    
Debt Instrument, Term   6 months   6 months  
Short-term Debt, Refinanced, Amount       $ 20.0  
Credit Facility [Domain]          
Short-term Debt [Line Items]          
Debt Instrument, Interest Rate, Effective Percentage       5.90% 0.00%
Short-term Debt, Maximum Amount Outstanding During Period       $ 15.0 $ 0.0
Credit Facility [Domain] | Revolving Credit Facility [Member]          
Short-term Debt [Line Items]          
Debt instrument, interest rate, stated percentage       3.50%