Public Offering (Details) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended		3 Months Ended
	Jun. 29, 2014	Jun. 30, 2013	Jun. 29, 2014 Public Offering Member	Jun. 29, 2014 Underwriters' Option [Member]
Class of Stock [Line Items]
Public stock offering	10,000,000		11,500,000	1,500,000
Share Price	$ 6.20
Proceeds from Issuance of Common Stock	$ 67,327	$ 0