Notes Payable and Related Credit Agreement - Components (Details) (USD $)
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1 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended | |||||||
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Dec. 31, 2013
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Dec. 31, 2012
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Apr. 05, 2012
Revolving Credit Facility
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Dec. 31, 2013
Revolving Credit Facility
Line of Credit
Revolver Facility Expiring April 5, 2017
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Dec. 31, 2012
Revolving Credit Facility
Line of Credit
Revolver Facility Expiring April 5, 2017
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Apr. 05, 2012
Term Loan
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Dec. 31, 2013
Term Loan
Line of Credit
Term Loan Due April 5, 2018
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Dec. 31, 2012
Term Loan
Line of Credit
Term Loan Due April 5, 2018
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Dec. 31, 2013
Standby Letters of Credit
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Dec. 31, 2012
Standby Letters of Credit
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Dec. 31, 2013
Secured Debt
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Debt Instrument [Line Items] | |||||||||||
Total credit agreement debt | $ 159,620,000 | $ 159,620,000 | $ 10,000,000 | $ 0 | $ 149,620,000 | $ 159,620,000 | |||||
Less unamortized discount on the Term Loan | (948,000) | (1,442,000) | |||||||||
Less current portion of notes payable, including Revolver | (10,000,000) | 0 | |||||||||
Long-term portion of notes payable | 148,672,000 | 158,178,000 | |||||||||
Credit facility, available | 75,000,000 | 50,000,000 | 50,000,000 | 200,000,000 | 200,000,000 | ||||||
Maturity date | Apr. 05, 2017 | Apr. 05, 2017 | Apr. 05, 2018 | Apr. 05, 2018 | |||||||
Weighted average interest rate | 3.17% | 5.97% | |||||||||
Letters of Credit | $ 27,691,000 | $ 31,879,000 | $ 18,176,000 |