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Debt (Details) (USD $)	3 Months Ended		0 Months Ended
Debt (Details) (USD $)	Mar. 31, 2015	Mar. 31, 2014	Jul. 02, 2014	Dec. 31, 2014	May 30, 2014	Dec. 13, 2013
Debt Instrument [Line Items]
Letters of credit	$ 4,300,000
Interest rate during period	4.54%	5.58%
Long-term Debt	205,307,000us-gaap_LongTermDebt			237,109,000us-gaap_LongTermDebt
Loan Agreement
Debt Instrument [Line Items]
Remaining amount available under the line of credit	190,400,000
Long-term Debt	105,307,000			137,109,000
Less unamortized deferred financing fees
Debt Instrument [Line Items]
Unamortized debt issuance expense	636,000			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