Common Stock and Series B Convertible Preferred Stock - Cash Dividend (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended
	Jul. 01, 2020	Apr. 30, 2020	Mar. 29, 2020	Mar. 31, 2019
Cash Dividend
Total dividends paid			$ 10,700
Dividends paid to common shareholders			7,300
Dividends paid to common shareholders			$ 7,237	$ 7,125
Dividend paid per common share (in dollars per share)			$ 0.225
Common stock dividends paid to preferred shareholders			$ 1,100
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		$ 7,300
Common stock dividends paid to preferred shareholders		$ 1,100
Series B Preferred Stock
Cash Dividend
Preferred dividends			$ 2,300
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	Jul. 01, 2020