Annual report pursuant to Section 13 and 15(d)

Fair Value Measurement - Fair Value of Assets and Liabilities Measured on a Recurring Basis (Details)

v3.6.0.2
Fair Value Measurement - Fair Value of Assets and Liabilities Measured on a Recurring Basis (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Recurring | Fair Value, Inputs, Level 2 | Interest Rate Swap    
Liabilities:    
Interest rate swap instruments $ 3,843 $ 4,681