Quarterly report pursuant to Section 13 or 15(d)

Senior Credit Facility (Details)

v2.4.0.8
Senior Credit Facility (Details) (USD $)
6 Months Ended
Jun. 30, 2013
Feb. 01, 2012
Years
Senior Credit Facility [Abstract]    
Senior credit facility amount   $ 150,000,000
Line of Credit Facility Term, In Years   5
Base reference rate of credit facilities LIBOR  
Interest rate spread above LIBOR as of reporting period (in hundredths) 1.10%  
Debt Instrument, Interest Rate, Effective Percentage 1.30%  
Letters of Credit Outstanding, Amount 11,266  
Available borrowing capacity $ 138,734