Restatement - Narrative (Details) (USD $)	3 Months Ended								6 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2014	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Dec. 31, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Jun. 28, 2014	Jun. 29, 2013	Sep. 27, 2014	Sep. 28, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Tax Expense	$ 1,122,000	$ (1,754,000)	$ (3,197,000)	$ (2,544,000)	$ 2,115,000	$ 1,000,000	$ (2,193,000)	$ 1,071,000	$ (5,741,000)	$ (1,122,000)	$ (7,495,000)	$ (122,000)	$ (6,373,000)	$ 1,993,000	$ (6,501,000)
Goodwill	157,569,000	157,569,000	157,569,000	157,569,000	157,569,000	157,569,000	157,569,000	157,569,000	157,569,000	157,569,000	157,569,000	157,569,000	157,569,000	157,569,000
Deferred tax assets	30,696,000				27,228,000								30,696,000	27,228,000
Impact of restatement on opening retained earnings																7,000,000
Restatement Adjustment
Cost of Goods Sold											(800,000)			(900,000)	(2,200,000)	(300,000)	1,300,000	6,700,000
Out of Period Tax Adjustments														(900,000)	0
Income Tax Expense		593,000	(88,000)	(315,000)		914,000	(96,000)	(157,000)	(403,000)	(253,000)	190,000	661,000		300,000	(923,000)	(2,700,000)
Goodwill		(4,371,000)	(4,371,000)	(4,371,000)	(4,371,000)	(4,371,000)	(4,371,000)	(4,371,000)	(4,371,000)	(4,371,000)	(4,371,000)	(4,371,000)		(4,371,000)		4,000,000
Goodwill impairment																1,400,000
Deferred tax assets																$ 1,600,000