Quarterly report pursuant to Section 13 or 15(d)

STOCKHOLDERS' EQUITY - Summary of Changes in Shareholders' Equity (Details)

v3.20.1
STOCKHOLDERS' EQUITY - Summary of Changes in Shareholders' Equity (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Beginning balance (in shares) 38,199,111  
Beginning balance $ 1,973,990 $ 1,720,755
Net earnings 71,152 25,412
Stock-based compensation expense 6,437 5,861
Issuance of stock 0 0
Share repurchases $ (60,813) (8,957)
Ending balance (in shares) 37,597,457  
Ending balance $ 1,990,766 $ 1,743,071
Common Stock [Member]    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Beginning balance (in shares) 38,199,000 38,073,000
Beginning balance $ 382 $ 381
Issuance of stock (in shares) 398,000 400,000
Issuance of stock $ 4 $ 4
Share repurchases (in shares) (1,000,000) (209,000)
Share repurchases $ (10) $ (2)
Ending balance (in shares) 37,597,000 38,264,000
Ending balance $ 376 $ 383
Additional Paid-in Capital [Member]    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Beginning balance 505,352 501,781
Stock-based compensation expense 6,437 5,861
Issuance of stock (4) (4)
Share repurchases (60,803) (8,955)
Ending balance 450,982 498,683
Retained Earnings [Member]    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Beginning balance 1,468,256 1,218,593
Net earnings 71,152 25,412
Ending balance $ 1,539,408 $ 1,244,005