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Derivative Instruments (Tables)
 12 Months Ended
Dec. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of Derivative Instruments [Table Text Block]
The fair value and balance sheet locations of the interest rate swaps as of December 31, 2015 and 2014, are as follows (in thousands):
 
December 31,
 
2015
 
2014
Accounts payable and other liabilities
$
550

 
$
—


The interest rate swaps have been effective since inception. The gains or losses on the effective swaps are recognized in other comprehensive loss, as follows (in thousands):
 
Year Ending December 31,
 
2015
 
2014
 
2013
Unrealized loss on interest rate hedge
$
(550
)
 
$
—

 
$
—