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Consolidated Statements of Cash Flows (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2019
Dec. 31, 2020
Stockholders equity $ 1,588,678 $ 1,448,008 $ 1,443,433 $ 1,574,329
Allowance for credit losses 5,000 5,000 5,000 $ 5,000
Income tax expense $ 19,985 22,791    
Income taxes   1,168    
Cumulative Effect of Adoption Adjustment | ASU 2016-13        
Stockholders equity   (3,832) (3,832)  
Allowance for credit losses   5,000 5,000  
Income tax expense   $ 1,168 $ 1,168