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Fair Value Measurements - Summary of Fair Value and Carrying Amounts of Long Term Debt (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Summary of The Fair Value And Carrying Amounts of Long Term Debt [Line Items]    
Net Carrying Value $ 226,922 $ 199,597
Fair Value, Inputs, Level 2 [Member]    
Summary of The Fair Value And Carrying Amounts of Long Term Debt [Line Items]    
Fair Value 239,736 190,190
Net Carrying Value $ 221,456 $ 196,946