Stockholders' Deficit - Cash Dividend (Details) - USD ($)					12 Months Ended
	Apr. 01, 2021	Feb. 19, 2021	Feb. 08, 2021	Jan. 25, 2021	Dec. 27, 2020	Dec. 29, 2019	Dec. 30, 2018
Cash Dividend
Total dividends paid					$ 43,100,000
Dividends paid to common shareholders					$ 29,362,000	$ 28,552,000	$ 28,985,000
Dividend paid per common share (in dollars per share)					$ 0.90
Preferred stock dividend rate					3.60%
Common Stock
Cash Dividend
Total dividends paid					$ 29,400,000	28,600,000	29,000,000.0
Subsequent event
Cash Dividend
Quarterly dividend declared, per share (in dollars per share)				$ 0.225
Subsequent event | Common Stock
Cash Dividend
Quarterly dividend, date of declaration				Jan. 25, 2021
Quarterly dividend declared				$ 7,400,000
Quarterly dividend, date of distribution		Feb. 19, 2021
Quarterly dividend, date of record			Feb. 08, 2021
Subsequent event | Preferred Stock
Cash Dividend
Quarterly dividend, date of declaration				Jan. 25, 2021
Quarterly dividend, date of distribution	Apr. 01, 2021
Series B Preferred Stock
Cash Dividend
Common stock dividends paid to preferred shareholders					4,600,000	4,300,000
Preferred dividends					$ 9,100,000	$ 5,700,000	$ 0
Series B Preferred Stock | Subsequent event
Cash Dividend
Preferred dividends				$ 1,100,000
Quarterly dividend declared				$ 2,300,000