Preferred Stock Preferred Stock (Details) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended
	Jul. 15, 2019 shares	Mar. 29, 2020 USD ($)	Mar. 31, 2019 USD ($)	Jul. 02, 2017 USD ($)	Dec. 31, 2017 $ / shares shares
Class of Stock [Line Items]
Preferred stock dividends | $		$ 0	$ 8,733
Depository Shares
Class of Stock [Line Items]
Depository shares issued (in shares)					5,200,000
Interest in preferred stock per depository share					0.01
Six Point Seven Five Percentage Series B Mandatory Convertible Preferred Stock
Class of Stock [Line Items]
Percentage of issued shares					6.75%
Offering price per share (in usd per share) | $ / shares					$ 100
Preferred stock converted in to common stock (in shares)	132.50
Number of common stock issued upon conversion (in shares)	6,900,000
Proceeds from offering, net | $				$ 501,000