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Stockholders' Equity - Discussion of Equity (Details) - USD ($)
1 Months Ended 3 Months Ended 13 Months Ended
Mar. 31, 2020
Mar. 31, 2021
Mar. 31, 2020
Jun. 30, 2020
Dec. 31, 2020
Sep. 30, 2020
Dec. 31, 2019
Equity [Abstract]              
Total stockholders’ equity $ 2,018,088,000 $ 2,045,581,000 $ 2,018,088,000   $ 2,053,745,000   $ 2,036,011,000
Share repurchase program, authorized amount           $ 50,000,000.0  
Common stock repurchased and recorded as treasury stock (in shares) 2,716,034 0   12,661,581      
Repurchase of treasury stock $ 36,200,000   $ 36,180,000 $ 200,000,000.0      
Dividends paid (in dollars per share)   $ 0.14 $ 0.14        
Allocated share-based compensation expense   $ 2,600,000 $ 2,000,000.0        
Gains (Losses) on Sales of Other Real Estate   $ 14,000 $ 61,000