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Long-Term Debt And Lines Of Credit (Debt Outstanding) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Debt Instrument [Line Items]    
Total $ 147,500us-gaap_LongTermDebt  
Current portion of term loan and revolving loan (6,250)us-gaap_LongTermDebtCurrent (183,564)us-gaap_LongTermDebtCurrent
Long-term debt 141,250us-gaap_LongTermDebtNoncurrent  
Revolving Credit Facility [Member]    
Debt Instrument [Line Items]    
Total 50,000us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember		  
Medium-term Notes [Member]    
Debt Instrument [Line Items]    
Total $ 97,500us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_MediumTermNotesMember