Debt - Narrative (Details) - USD ($)	1 Months Ended
	Jan. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Deferred financing costs, net		$ 38,522,000	$ 36,421,000
4.90% Senior Notes Due 2029 | Senior Notes
Debt Instrument [Line Items]
Debt instrument face amount	$ 400,000,000
Interest Rate	4.90%
Net proceeds from debt issuance	$ 395,300,000
Underwriting fees	2,600,000
Unamortized discount	2,100,000
Deferred financing costs, net	$ 1,000,000