Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Fair Value Measurements (Details)

v3.8.0.1
Summary of Significant Accounting Policies - Fair Value Measurements (Details)
$ in Thousands
Sep. 30, 2017
USD ($)
Accounting Policies [Abstract]  
Long-term debt carrying value $ 202,297
Level 2  
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]  
Carrying value of fixed-rate long-term debt in excess of fair value $ 110