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Line of Credit (Details) (USD $)
3 Months Ended 9 Months Ended 0 Months Ended
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Oct. 02, 2012
Line of Credit [Member]
Oct. 02, 2012
Line of Credit [Member]
US Bank [Member]
London Interbank Offered Rate (LIBOR) [Member]
Minimum [Member]
Oct. 02, 2012
Line of Credit [Member]
US Bank [Member]
London Interbank Offered Rate (LIBOR) [Member]
Maximum [Member]
Oct. 02, 2012
Line of Credit [Member]
US Bank [Member]
Base Rate [Member]
Minimum [Member]
Oct. 02, 2012
Line of Credit [Member]
US Bank [Member]
Base Rate [Member]
Maximum [Member]
Oct. 02, 2012
Line of Credit [Member]
US Bank [Member]
Enson [Member]
Sep. 30, 2013
Letter of Credit [Member]
Line of Credit Facility [Line Items]                    
Maximum borrowing capacity       $ 55,000,000            
Letter of credit outstanding amount                   13,000
Subsidiary ownership percentage securing facility                 65.00%  
Basis spread on variable rate         1.25% 1.75% (0.25%) 0.25%    
Total interest expense on borrowings $ 100,000 $ 23,000 $ 200,000