Debt (Details) - USD ($)		3 Months Ended		6 Months Ended
	Jul. 02, 2014	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014	May. 30, 2014	Dec. 13, 2013
Debt Instrument [Line Items]
Letters of credit		$ 4,300,000		$ 4,300,000
Interest rate during period		4.61%	4.05%	4.58%	4.68%
Long-term Debt		$ 201,977,000		$ 201,977,000		$ 237,109,000
Loan Agreement
Debt Instrument [Line Items]
Remaining amount available under the line of credit		193,700,000		193,700,000
Long-term Debt		101,977,000		101,977,000		137,109,000
Less unamortized deferred financing fees
Debt Instrument [Line Items]
Unamortized debt issuance expense		$ 592,000		$ 592,000		$ 680,000
Loan Agreement
Debt Instrument [Line Items]
Maximum borrowing capacity on line of credit							$ 300,000,000	$ 200,000,000
Company borrowed under loan agreement to fund Scepter acquisition	$ 135,300,000