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Long-Term Debt Long-Term Debt (Long-term Debt Table) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Current maturities on long-term debt	$ (11,469)	$ (11,086)
Long-term debt, excluding current maturities	158,718	163,541
Secured Debt [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Long-term debt	43,000	44,700
Secured Debt [Member] | Term Loan [Member]
Debt Instrument [Line Items]
Long-term debt	125,000	127,500
Notes Payable, Other Payables [Member] | Acquisition Debt, Deferred Purchase Price [Member]
Debt Instrument [Line Items]
Long-term debt	$ 2,187	$ 2,427

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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.

+ References

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Carrying amount of long-term debt, net of unamortized discount or premium, scheduled to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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