Summary of Significant Accounting Policies and New Accounting Guidance Deferred Charges (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accounting Policies [Abstract]
Unamortized deferred financing costs	$ 5,900,000	$ 1,600,000
Debt issuance costs	6,400,000	0	$ 0
Amortization of financing costs	$ 1,500,000	$ 1,400,000	$ 1,400,000