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		9 Months Ended
	Oct. 01, 2016	Sep. 26, 2015	Oct. 01, 2016	Sep. 26, 2015
Earnings Per Share [Abstract]
Income (loss) from continuing operations	$ 8,745	$ (3,562)	$ 72,625	$ (15,096)
Income (loss) from discontinued operations, net of taxes	686	319	(4,435)	1,769
Net income (loss)	9,431	(3,243)	68,190	(13,327)
Interest expense on 7% Notes, net of taxes	211	0	1,521	0
Income (loss) from continuing operations - after assumed conversions of dilutive shares	8,956	(3,562)	74,146	(15,096)
Net income (loss) for diluted loss per share - after assumed conversions of dilutive shares	$ 9,642	$ (3,243)	$ 69,711	$ (13,327)
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Basic shares	8,552	8,484	8,518	8,477
Dilutive effect of 7% Notes (shares)	415	0	1,227	0
Dilutive effect of Equity Awards (shares)	0	0	0	0
Dilutive effect of Warrants (shares)	0	0	0	0
Diluted shares	8,967	8,484	9,745	8,477
Income (loss) per share – basic:
Continuing operations per share - basic	$ 1.02	$ (0.42)	$ 8.53	$ (1.78)
Discontinued operations per share - basic	0.08	0.04	(0.52)	0.21
Net income (loss) per share - basic	1.10	(0.38)	8.01	(1.57)
Income (loss) per share – diluted:
Continuing operations per share - diluted	1.00	(0.42)	7.61	(1.78)
Discontinued operations per share - diluted	0.08	0.04	(0.46)	0.21
Net income (loss) per share - diluted	$ 1.08	$ (0.38)	$ 7.15	$ (1.57)