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Debt (Details) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2014
Dec. 31, 2013
Debt [Abstract]    
Revolving line of credit limit $ 30,000  
Line of credit maturity date Sep. 23, 2014  
Period of fixed interest on line of credit at company's options 1 year  
Outstanding drawings on line of credit 20,000 10,000
Effective interest rate (in hundredths) 1.55%  
Remaining unused amount under line of credit $ 10,000