Schedule I - Condensed Financial Information Of Registrant (Unconsolidated Statements Of Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Condensed Financial Statements, Captions [Line Items]
Interest Expense	$ (125,626)	$ (129,493)	$ (121,771)
Loss on early extinguishment of debt	0	(2,424)	0
Other income / (expense), net	17,667	3,370	(10,546)
Total other income / (expense), net	(102,547)	(123,973)	(128,831)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	148,123	138,559	167,921
Less: income tax expense	28,941	28,592	35,528
Net income	119,182	109,967	132,393
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Equity in earnings of subsidiaries	147,030	140,030	154,078
Interest Expense	(41,380)	(42,212)	(32,761)
Loss on early extinguishment of debt	0	(2,415)	0
Other income / (expense), net	(45)	73	(46)
Total other income / (expense), net	105,605	95,476	121,271
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	105,605	95,476	121,271
Less: income tax expense	(10,364)	(11,278)	(7,909)
Net income	$ 115,969	$ 106,754	$ 129,180