Debt (Textual) (Details) $ in Thousands	Sep. 30, 2021 USD ($)	May 06, 2021 USD ($)	Feb. 04, 2021 USD ($)	Dec. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)
Line of Credit Facility [Line Items]
Short-term debt	$ 281,199			$ 403,703	$ 100,405
Debt Instrument, Coverage Ratio	1.4
Long-term Debt, Current Maturities	$ 106,255			69,366	62,499
Nonrecourse
Line of Credit Facility [Line Items]
Short-term debt	81,494			93,192	40,985
Long-term Debt, Current Maturities	69,932			678	211
Notes payable
Line of Credit Facility [Line Items]
Debt amount		$ 358,000	$ 250,000
Short-term debt	200,000
Estimate of Fair Value Measurement
Line of Credit Facility [Line Items]
Long-term debt, fair value	667,900			$ 1,003,100	$ 831,300
Line of credit
Line of Credit Facility [Line Items]
Credit facility, maximum borrowing capacity	1,297,500
Total available for borrowings under lines of credit	$ 1,169,900