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Derivative Instruments and Hedging Activities (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]          
Interest rate cap $ (52) $ 0 $ 9 $ 0  
Level 2 measurement | Interest rate cap          
Derivatives, Fair Value [Line Items]          
Notional Amount $ 300,000   $ 300,000    
LIBOR Rate 4.00%   4.00%    
Fair Value $ 6   $ 6   $ 11