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Summary of Significant Accounting Policies - Recent Accounting Pronouncements (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Cumulative adjustment due to the adoption of new accounting standards $ 1,164      
Cash flows from operating activities 209,413 $ 178,330 $ 146,601  
Cash flows from financing activities 43,130 $ (83,341) 497,803  
ASU 2016-15        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Cash flows from operating activities     1,500  
Cash flows from financing activities     $ (1,500)  
Retained Earnings        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Cumulative adjustment due to the adoption of new accounting standards $ 224      
Retained Earnings | ASU 2014-09        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Cumulative adjustment due to the adoption of new accounting standards       $ 200