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Notes Payable (Tables)
 12 Months Ended
Dec. 31, 2014
Notes Payable [Abstract]  
Summary of Credit Agreement and Notes Payable
Notes payable as of December 31, 2014 and 2013 consisted of the following (dollars in thousands):

  
December 31, 2014
  
December 31, 2013
 
Credit Agreement average effective interest rate of 2.4% inclusive of unused fee
 
$
34,500
  
$
40,000
 
Various notes payable with $883 plus accrued interest due in the next year; interest accrues at 3.25% per annum
  
1,117
   
1,475
 
  
35,617
   
41,475
 
Less current portion
  
(883
)
  
(825
)
Long-term portion
 
$
34,734
  
$
40,650
 
Summary of Aggregate Annual Payments of Principal Required to Revolving Credit Facility
Aggregate annual payments of principal required pursuant to the Credit Agreement and the above notes payable subsequent to December 31, 2014 are as follows (in thousands):
 
 
 
December 31, 2014
 
During the twelve months ended December 31, 2015
 
$
883
 
During the twelve months ended December 31, 2016
  
234
 
During the twelve months ended December 31, 2017
-
During the twelve months ended December 31, 2018
  
34,500
 
 
 
$
35,617