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Stockholders' Equity - Stock Repurchase Program (Details) - USD ($)
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Nov. 06, 2018
Class of Stock [Line Items]      
Repurchase of common stock (shares) (58,713) (1,291,644)  
Repurchase of common stock $ 1,900,000 $ 46,200,000  
Common Stock      
Class of Stock [Line Items]      
Stock Repurchase Program, Authorized Amount     $ 500,000,000.0
Stock Purchase Agreement [Member]      
Class of Stock [Line Items]      
Stock Repurchase Program, Remaining Authorized Repurchase Amount $ 229,700,000