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Financial Derivative Instruments (Tables)
6 Months Ended
Jun. 30, 2016
Financial Derivative Instruments [Abstract]  
Schedule of Notional Amounts of Outstanding Derivative Positions
  Notional Termination 3-Month LIBOR     Premium   Unamortized   Fair
  Amount Date Strike Rate     Paid   Premium   Value
 
$ 25,000 06/02/21 3.00 % $ 922 $ 915 $ 76
$ 20,000 06/04/24 3.00 % $ 1,470 $ 1,466 $ 284
$ 20,000 10/21/21 3.00 % $ 632 $ 631 $ 83
$ 25,000 10/21/24 3.00 % $ 1,542 $ 1,541 $ 399
Schedule of Interest Rate Derivatives
    Gross     Net of Tax  
June 30, 2016            
Unrealized loss on interest rate caps $ (3,711 ) $ (2,412 )
Unamortized premium on interest rate caps   4,553     2,959  
Total $ 842   $ 547  
 
December 31, 2015            
Unrealized loss on interest rate caps $ (2,495 ) $ (1,621 )
Unamortized premium on interest rate caps   4,564     2,966  
Total $ 2,069   $ 1,345