Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Recent Accounting Pronouncements (Details)

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Summary of Significant Accounting Policies - Recent Accounting Pronouncements (Details) - Accounting Standards Update 2016-09 - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Deferred income tax assets, net $ 4,000  
Cumulative effect of new accounting principle in period of adoption   $ 4,000
Retained Earnings    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Cumulative effect of new accounting principle in period of adoption $ 4,000 $ 4,000