Debt - Schedule of Long Term Debt (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Debt Disclosure [Abstract]
Revolving Credit agreement, 2.2% and 2.4% weighted-average interest rate at March 31, 2015 and December 31, 2014, respectively, due through 2019	$ 136,375us-gaap_LinesOfCreditCurrent	$ 139,500us-gaap_LinesOfCreditCurrent
Capital lease obligations, 6.0% weighted-average interest at both March 31, 2015 and December 31, 2014, due through 2018	1,405us-gaap_CapitalLeaseObligations	1,520us-gaap_CapitalLeaseObligations
Total debt	137,780us-gaap_LongTermDebtNoncurrent	141,020us-gaap_LongTermDebtNoncurrent
Current portion	(29,361)us-gaap_LongTermDebtCurrent	(27,856)us-gaap_LongTermDebtCurrent
Long-term debt and capital lease obligations	$ 108,419us-gaap_LongTermDebt	$ 113,164us-gaap_LongTermDebt

The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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