Common Stock and Series B Convertible Preferred Stock - Cash Dividend (Details) - USD ($) $ / shares in Units, $ in Thousands			6 Months Ended
	Oct. 01, 2020	Jul. 31, 2020	Jun. 28, 2020	Jun. 30, 2019
Cash Dividend
Total dividends paid			$ 21,300
Dividends paid to common shareholders			14,500
Dividends paid to common shareholders			$ 14,520	$ 14,269
Dividend paid per common share (in dollars per share)			$ 0.45
Common stock dividends paid to preferred shareholders			$ 2,300
Preferred stock dividend rate			3.60%
Quarterly dividend declared, per share (in dollars per share)		$ 0.225
Forecast
Cash Dividend
Dividends paid to common shareholders		$ 7,400
Common stock dividends paid to preferred shareholders		$ 1,100
Series B Preferred Stock
Cash Dividend
Preferred dividends			$ 4,500
Series B Preferred Stock | Forecast
Cash Dividend
Quarterly dividend declared	$ 2,300
Series B Preferred Stock | Subsequent event | Forecast
Cash Dividend
Quarterly dividend, date of declaration	Oct. 01, 2020