Quarterly report pursuant to Section 13 or 15(d)

Shareholders' Equity Rollforward (Details)

v3.20.1
Shareholders' Equity Rollforward (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
As of beginning balance $ 520,745 $ 447,355
Net income (loss) 163,094 (38,697)
All other changes 556 380
As of ending balance 684,319 408,944
Share-based compensation 856 1,038
Common Stock    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
As of beginning balance 151 151
All other changes 1 0
As of ending balance 152 151
Paid-in Capital    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
As of beginning balance 200,666 197,630
All other changes 556 381
As of ending balance 201,222 198,011
Retained Earnings    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
As of beginning balance 319,987 249,492
Net income (loss) 163,094 (38,697)
All other changes 0 0
As of ending balance 483,005 210,701
Accumulated Other Comprehensive Loss    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
As of beginning balance (59) 82
All other changes (1) (1)
As of ending balance $ (60) $ 81
Time Vested Restricted Stock Units [Member]    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Shares, Issued 22,321 24,657
Accounting Standards Update 2016-13 | Adjustment upon adoption    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
As of beginning balance $ (76)  
Accounting Standards Update 2016-13 | Adjustment upon adoption | Retained Earnings    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
As of beginning balance $ (76)  
Accounting Standards Update 2016-02 | Adjustment upon adoption    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
As of beginning balance   $ (94)
Accounting Standards Update 2016-02 | Adjustment upon adoption | Retained Earnings    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
As of beginning balance   $ (94)