Schedule I - Condensed Financial Information Of Registrant Schedule I - Condensed Financial Information Of Registrant (Unconsolidated Statements of Comprehensive Income/(Loss)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Condensed Statement of Income Captions [Line Items]
Net Income (Loss) Available to Common Stockholders, Basic	$ 129,180	$ 130,812	$ 105,580
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	(19,750)	0	0
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	(19,750)	0	0
Other Comprehensive Income (Loss), Net of Tax		0	0
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	109,430	130,812	105,580
Parent Company [Member]
Condensed Statement of Income Captions [Line Items]
Net Income (Loss) Available to Common Stockholders, Basic	129,180	130,812	105,580
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	(19,750)	0	0
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	(19,750)	0	0
Other Comprehensive Income (Loss), Net of Tax	(19,750)	0	0
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	109,430	$ 130,812	$ 105,580
Interest Rate Contract [Member]
Condensed Statement of Income Captions [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	$ (19,750)