Income (Loss) Per Share (Computation of Basic and Diluted Income (Loss) per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016
Earnings Per Share [Abstract]
(Loss) income from continuing operations	$ (1,851)	$ 50,860	$ (10,543)	$ 63,880
Loss from discontinued operations, net of taxes	0	(3,304)	0	(5,121)
Net (loss) income	(1,851)	47,556	(10,543)	58,759
Interest expense on 7% Notes, net of taxes	0	572	0	1,311
(Loss) income from continuing operations - after assumed conversions of dilutive shares	(1,851)	51,432	(10,543)	65,191
Net (loss) income for diluted loss per share - after assumed conversions of dilutive shares	$ (1,851)	$ 48,128	$ (10,543)	$ 60,070
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Basic shares	8,561	8,517	8,557	8,501
Dilutive effect of 7% Notes (shares)	0	1,460	0	1,642
Dilutive effect of Equity Awards (shares)	0	0	0	0
Dilutive effect of warrants (shares)	0	0	0	0
Diluted shares	8,561	9,977	8,557	10,143
(Loss) income per share – basic:
Continuing operations per share - basic	$ (0.22)	$ 5.97	$ (1.23)	$ 7.51
Discontinued operations per share - basic	0.00	(0.39)	0.00	(0.60)
Net (loss) income per share - basic	(0.22)	5.58	(1.23)	6.91
(Loss) income per share – diluted:
Continuing operations per share - diluted	(0.22)	5.15	(1.23)	6.43
Discontinued operations per share - diluted	0.00	(0.33)	0.00	(0.51)
Net (loss) income per share - diluted	$ (0.22)	$ 4.82	$ (1.23)	$ 5.92