Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity Common Stock Rollforward (Details)

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Stockholders' Equity Common Stock Rollforward (Details) - shares
 1 Months Ended 12 Months Ended
Mar. 22, 2019
Jul. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Increase (Decrease) in Common Stock Outstanding [Roll Forward]          
Common shares outstanding at beginning of period (in shares)     248,085,721 174,496,587 173,826,163
Number of shares of stock issued during period (in shares)         26,950
Number of shares of restricted common stock issued during period (in shares)         643,474
Number of shares of common stock repurchased during period (in shares)     (1,500) 0 0
Common shares outstanding at end of period (in shares)     272,935,731 248,085,721 174,496,587
Number of nonvested restricted common shares outstanding (in shares)     1,062,901 1,593,701 1,284,010
Common Stock [Member]          
Increase (Decrease) in Common Stock Outstanding [Roll Forward]          
Common shares outstanding at beginning of period (in shares)     248,085,721    
Number of shares of stock issued during period (in shares) 18,000,000 72,600,000 24,439,436 72,616,483  
Number of shares of restricted common stock issued during period (in shares)     412,074 972,651  
Number of shares of common stock repurchased during period (in shares)     (1,500)    
Common shares outstanding at end of period (in shares)     272,935,731 248,085,721